Britney Spears holds her awards for Best Female, Best Pop, Best Song and Best Breakthrough performer for the 1999 MTV Europe Awards at The Point in Dublin late 11 November 1999. (ELECTRONIC IMAGE) (Photo JOEL SAGET/AFP/Getty Images)
Britney Spears performs during the 42nd Annual Grammy Awards in Los Angeles, CA, 23 February 2000. (ELECTRONIC IMAGE) (Photo HECTOR MATA/AFP/Getty Images)
Britney Spears and Justin Timberlake arrive backstage at the 28th Annual American Music Awards 08 January 2001 in Los Angeles. (Photo LUCY NICHOLSON/AFP/Getty Images)
Britney Spears performs at the 28th Annual American Music Awards 08 January 2001 in Los Angeles, CA. (Photo Vince Bucci/AFP/Getty Images)
Britney Spears at KIIS-FM's 'Wango Tango' at Dodger Stadium in Los Angeles, Ca. on 16th June 2001. Photo by Kevin Winter/Getty Images.
Britney Spears and Justin at *NSYNC's party to celebrate the release of their new CD 'Celebrity' at Moomba in Los Angeles, Ca. 23rd July 2001. Photo by Kevin Winter/Getty Images.
Britney Spears and Justin at *NSYNC's party to celebrate the release of their new CD 'Celebrity' at Moomba in Los Angeles, Ca. 23rd July 2001. Photo by Kevin Winter/Getty Images.
Britney Spears performs with a snake draped over her shoulders at the 2001 MTV Video Music Awards 06 September, 2001, in New York. (Photo TIMOTHY A.CLARY/AFP/Getty Images)
Britney Spears attends the release party for her new album 'Britney' November 6, 2001 in New York. (Photo by Lawrence Lucier/Getty Images)
Britney Spears performing at the Nassau Veterans Memorial Coliseum in Uniondale, New York on November 7, 2001. photo by Gabe Palacio/Getty Images
Britney Spears appears at the 44th Annual Grammy Awards at the Staples Center in Los Angeles, 27 February 2002. AFP PHOTO/ Lee CELANO (Photo LEE CELANO/AFP/Getty Images)
Britney Spears arrives at the premiere of her film 'Crossroads,' with Justin Timberlake of the group *NSYNC, in Los Angeles, CA, 11 February 2002. (Photo LUCY NICHOLSON/AFP/Getty Images)
Justin Timberlake, Britney Spears, and Chris Kirkpatrick at the 'NBA All-Star Game' at the First Union Center in Philadelphia, Pa. 10th february 2002. Photo by Scott Gries/NBAE/Getty Images
Britney Spears attends the promotion of her new movie Crossroads at Hotel Palace March 21, 2002 in Madrid, Spain. (Photo by Carlos Alvarez/Getty Images)
Pop singer Britney Spears and Michael Jackson hold hands on stage at the MTV Video Music Awards 29 August, 2002 in New York. (Photo TIMOTHY A. CLARY/AFP/Getty Images)
Britney Spears at the premiere and after-party for 'The Four Feathers' at the Mann Village Theatre and Armand Hammer Museum in Westwood, Ca. Monday, Sept. 17, 2002. Photo by Kevin Winter/ImageDirect.
Britney Spears celebrates at a New Year's Eve party hosted by herself and actress Natalie Portman at Ian Schrager's Hudson Hotel December 31, 2002 in New York City. (Photo by Matthew Peyton/Getty Images)
Britney Spears leaves the Project Greenlight Party at Harry O's during the 2003 Sundance Film Festival on January 18, 2003 in Park City, Utah. (Photo by Frazer Harrison/Getty Images)
Britney Spears and actor Colin Farrell arrive at the premiere of 'The Recruit' at the Cinerama Dome on January 28, 2003 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
Britney Spears backstage at the first MTV 'TRL Awards' at the MTV Times Square Studios February 6, 2003 in New York City. Britney co-hosted the show with Carson Daly. (Photo by Frank Micelotta/Getty Images)
Britney Spears speaks on stage during the first MTV 'TRL Awards' at the MTV Times Square Studios on February 6, 2003 in New York City. (Photo by Frank Micelotta/Getty Images)
Britney Spears shops in Calypso at the Sunset Plaza on February 14, 2003 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)
Britney Spears and friend drive through In-N-Out Burger on February 27, 2003 in Hollywood, California. (Photo by Mel Bouzad/Getty Images)
Britney Spears and Jamie Linn Spears lduring Nickelodeon's 16th Annual Kids' Choice Awards at the Barker Hangar April 12, 2003 in Santa Monica, California. (Photo by Frank Micelotta/Getty Images)
Britney Spears and Will Ferrell during Nickelodeon's 16th Annual Kids' Choice Awards at the Barker Hangar April 12, 2003 in Santa Monica, California. (Photo by Frank Micelotta/Getty Images)
Britney Spears announces an online charity auction of her memorabilia to benefit the Britney Spears Foundation at the W Court Hotel May 22, 2003 in New York City. (Photo by Myrna Suarez/Getty Images)
Singers Britney Spears(L), Madonna, and Christina Aguilera perform onstage during the 2003 MTV Video Music Awards at Radio City Music Hall on August 28, 2003 in New York City. (Photo by Scott Gries/Getty Images)
Singers Britney Spears(L), Madonna, and Christina Aguilera perform onstage during the 2003 MTV Video Music Awards at Radio City Music Hall on August 28, 2003 in New York City. (Photo by Frank Micelotta/Getty Images)
Britney Spears poses at the Dieselstylelab Spring/Summer 2004 Collection at Bryant Park during the 7th on Sixth Mercedes-Benz Fashion Week on September 17, 2003 in New York City. (Photo by Matthew Peyton/Getty Images)
Britney Spears attends a ceremony honoring her with a star on the Hollywood Walk of Fame on November 17, 2003 on Hollywood Boulevard in Hollywood, California. (Photo by Vince Bucci/Getty Images)
Britney Spears performs at 102.7 KIIS-FM's 3rd Annual Jingle Ball at the Staples Center on December 5, 2003 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Britney Spears on March 27, 2004 in Miami, Florida. (Photo by Frank Micelotta/Getty Images)
Britney Spears performs on the Stage of Lyon, central eastern France, 18 May 2004, during her European Tour (Photo MARTIN BUREAU/AFP/Getty Images)
Britney Spears and husband Kevin Federline arrive at the 2004 Billboard Music Awards on December 8, 2004 at the MGM Grand Garden Arena, in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)
Britney Spears and Kevin Federline arrive at the 2006 Grammy Nominees party on February 6, 2005 in Hollywood, California. (Photo by Matthew Simmons/Getty Images for Rolling Stone)
Britney Spears arrives at the Warner Bros. Premiere of Charlie and the Chocolate Factory at the Grauman's Chinese Theatre on July 10, 2005 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
Britney Spears performs on stage during the 2007 MTV Video Music Awards held at The Palms Hotel and Casino on September 9, 2007 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)
Britney Spears celebrates her birthday inside The ScandinavianStyle Mansion December 1, 2007 in Bel Air, California. (Photo by Toby Canham/Getty Images)
Britney Spears celebrates her birthday inside The ScandinavianStyle Mansion December 1, 2007 in Bel Air, California. (Photo by Toby Canham/Getty Images)
US pop star Britney Spears arrives at the Los Angeles County Superior courthouse 14 January 2008 for a hearing regarding visitation rights for her two sons that she has with ex-husband Kevin Federline. (Photo GABRIEL BOUYS/AFP/Getty Images)
Britney Spears wins Best Pop Video for 'Piece of Me' at the 2008 MTV Video Music Awards on the Paramount Studios lot on September 7, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Madonna, with special guest singer Britney Spears, performs during her Sticky and Sweet Tour at Dodger Stadium on November 6, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Britney Spears, winner of bambi award, poses with the trophy at the Bambi Awards 2008 on November 27, 2008 in Offenburg, Germany. (Photo by Patrik Stollarz/Getty Images)
Britney Spears performs on ABC's 'Good Morning America' at The Big Apple Circus tent at Lincoln Center on December 2, 2008 in New York City. (Photo by Bryan Bedder/Getty Images)
Britney Spears arrives at the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)
Britney Spears (R) and agent Jason Trawick attend An Evening of 'Southern Style' presented by the St. Bernard Project & the Spears family at a private residence on May 11, 2011 in Beverly Hills, California. (Photo by David Livingston/Getty Images)
Britney Spears (L) and Rihanna perform onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for ABC)
Britney Spears attends 'The X Factor' Season 2 auditions at the Dunkin Donuts Center on June 27, 2012 in Providence, Rhode Island. (Photo by Paul Marotta/Getty Images)
The X Factor judges L.A. Reid, Demi Lovato, Britney Spears and Simon Cowell on September 11, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Jason Trawick and Britney Spears attend City Of Hope Honors Halston CEO Ben Malka With Spirit Of Life Award - Red Carpet at Exchange LA on October 10, 2012 in Los Angeles, California. (Photo by Michael Kovac/Getty Images for City of Hope)
Britney Spears attends Fox's 'The X Factor' season finale news conference at CBS Television City on December 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
Britney Spears attends Fox's 'The X Factor' viewing party at Mixology101 & Planet Dailies on December 6, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images)
Britney Spears attends 102.7 KIIS FM's Wango Tango 2013 held at The Home Depot Center on May 11, 2013 in Carson, California. (Photo by Frazer Harrison/Getty Images)
Britney Spears (C), sons Sean Federline, and Jayden James Federline attend the premiere of Columbia Pictures' 'Smurfs 2' at Regency Village Theatre on July 28, 2013 in Westwood, California. (Photo by Jason Merritt/Getty Images)
Britney Spears attends the iHeartRadio Music Festival at the MGM Grand Garden Arena on September 21, 2013 in Las Vegas, Nevada. (Photo by Jason Kempin/Getty Images for Clear Channel)
Britney Spears, winner of the Favorite Pop Artist award, poses in the press room at The 40th Annual People's Choice Awards at Nokia Theatre L.A. Live on January 8, 2014 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
Britney Spears attends the 22nd Annual Elton John AIDS Foundation's Oscar Viewing Party on March 2, 2014 in Los Angeles, California. (Photo by Mark Davis/Getty Images for EJAF)
Britney Spears arrives prior to the presentation of dessous collection 'The Intimate Collection' at CentrO shopping mall on September 25, 2014 in Oberhausen, Germany. (Photo by Sascha Steinbach/Getty Images)
Britney Spears presents her dessous collection 'The Intimate Collection' at CentrO shopping mall on September 25, 2014 in Oberhausen, Germany. (Photo by Sascha Steinbach/Getty Images)
Britney Spears attends a 'Britney Day' event at The LINQ Promenade held to celebrate her Las Vegas residency show 'Britney: Piece of Me' on November 5, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
Britney Spears arrives on the red carpet at the MTV Video Music Awards (VMA), August 30, 2015 at the Microsoft Theater in Los Angeles, California. (Photo MARK RALSTON/AFP/Getty Images)
Britney Spears arrives on the red carpet at the MTV Video Music Awards (VMA), August 30, 2015 at the Microsoft Theater in Los Angeles, California. (Photo MARK RALSTON/AFP/Getty Images)
Britney Spears poses in the press room during the Teen Choice Awards 2015 at the USC Galen Center on August 16, 2015 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
Britney Spears performs onstage during the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)
Britney Spears attends the 2016 MTV Video Music Awards at Madison Square Garden on August 28, 2016 in New York City. (Photo by Jamie McCarthy/Getty Images)
Britney Spears (L) performs onstage at the 2016 iHeartRadio Music Festival at T-Mobile Arena on September 24, 2016 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)
Britney Spears performs onstage at the 2016 iHeartRadio Music Festival at T-Mobile Arena on September 24, 2016 in Las Vegas, Nevada. (Photo by Isaac Brekken/Getty Images for iHeartMedia)
396954 22: Singer Britney Spears attends the release party for her new album "Britney" November 6, 2001 in New York. (Photo by Lawrence Lucier/Getty Images)
402689 01: Singer Britney Spears attends the promotion of her new movie Crossroads at Hotel Palace March 21, 2002 in Madrid, Spain. (Photo by Carlos Alvarez/Getty Images)
399810 01: (U.K. OUT) Singer Britney Spears leaves the Mandarin Oriental Hotel January 18, 2002 in London. The pop star is on a two-day visit to the U.K. to promote her latest single "Overprotected." (Photo by Steve Reigate/BWP Media/Getty Images)
NEW YORK - DECEMBER 31: (U.S. TABLOIDS OUT) Singer Britney Spears celebrates at a New Year's Eve party hosted by herself and actress Natalie Portman at Ian Schrager's Hudson Hotel December 31, 2002 in New York City. (Photo by Matthew Peyton/Getty Images)
HOLLYWOOD - JANUARY 28: Singer Britney Spears and actor Colin Farrell arrive at the premiere of "The Recruit" at the Cinerama Dome on January 28, 2003 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
HOLLYWOOD, CA - February 14: Musician Britney Spears shops in Calypso at the Sunset Plaza on February 14, 2003 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)
NEW YORK - FEBRUARY 17: (TABS OUT) Britney Spears backstage at the first MTV "TRL Awards" at the MTV Times Square Studios February 6, 2003 in New York City. Britney co-hosted the show with Carson Daly. (Photo by Frank Micelotta/Getty Images)
HOLLYWOOD, CA - FEBRUARY 27: Musician Britney Spears and friend drive through In-N-Out Burger on February 27, 2003 in Hollywood, California. (Photo by Mel Bouzad/Getty Images)
LOS ANGELES - MARCH 5: Singer Britney Spears shops for eyeglasses on Melrose Avenue on March 5, 2003 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
SANTA MONICA, CA - APRIL 12: Britney Spears and Will Ferrel during Nickelodeon's 16th Annual Kids' Choice Awards at the Barker Hangar April 12, 2003 in Santa Monica, California. (Photo by Frank Micelotta/Getty Images)
NEW YORK - MAY 22: Singer Britney Spears announces an online charity auction of her memorabilia to benefit the Britney Spears Foundation at the W Court Hotel May 22, 2003 in New York City. Spears is wearing a dress by Martine Sitbon. (Photo by Myrna Suarez/Getty Images)
NEW YORK - FEBRUARY 17: (U.S. TABS OUT) Singer Britney Spears speaks on stage during the first MTV "TRL Awards" at the MTV Times Square Studios on February 6, 2003 in New York City. (Photo by Frank Micelotta/Getty Images)
Britney Spears performing at the Nassau Veterans Memorial Coliseum in Uniondale, New York on November 7, 2001. photo by Gabe Palacio/Getty Images
Britney Spears performing at the Nassau Veterans Memorial Coliseum in Uniondale, New York on November 7, 2001. photo by Gabe Palacio/Getty Images
Britney Spears at KIIS-FM's 'Wango Tango' at Dodger Stadium in Los Angeles, Ca. 6/16/01. Photo by Kevin Winter/Getty Images.
Britney Spears and Justin at *NSYNC's party to celebrate the release of their new CD 'Celebrity' at Moomba in Los Angeles, Ca. 7/23/01. Photo by Kevin Winter/Getty Images.
Britney Spears at *NSYNC's party to celebrate the release of their new CD 'Celebrity' at Moomba in Los Angeles, Ca. 7/23/01. Photo by Kevin Winter/Getty Images.
Britney Spears at the premiere and after-party for "The Four Feathers" at the Mann Village Theatre and Armand Hammer Museum in Westwood, Ca. Monday, Sept. 17, 2002. Photo by Kevin Winter/ImageDirect.
Justin Timberlake, Britney Spears, and Chris Kirkpatrick at the "NBA All-Star Game" at the First Union Center in Philadelphia, Pa. 2/10/02 Photo by Scott Gries/NBAE/Getty Images
NEW YORK - AUGUST 28: (U.S. TABLOIDS OUT) Singers Britney Spears(L), Madonna, and Christina Aguilera perform onstage during the 2003 MTV Video Music Awards at Radio City Music Hall on August 28, 2003 in New York City. (Photo by Scott Gries/Getty Images)
WASHINGTON D.C. - SEPTEMBER 3: Singer Britney Spears attends a press conference for the 2003 "NFL Kickoff Live from the National Mall" at the Ritz-Carlton Hotel in Washington D.C. On September 4th thousands of American military personnel will attend the Washington D.C. concert featuring Spears, Mary J. Blige, Aerosmith, Good Charlotte, and Aretha Franklin. (Photo by Frank Micelotta/Getty Images)
NEW YORK - SEPTEMBER 17: (US TABS AND HOLLYWOOD REPORTER OUT) Britney Spears poses at the Dieselstylelab Spring/Summer 2004 Collection at Bryant Park during the 7th on Sixth Mercedes-Benz Fashion Week on September 17, 2003 in New York City. (Photo by Matthew Peyton/Getty Images)
HOLLYWOOD - NOVEMBER 17: Singer Britney Spears attends a ceremony honoring her with a star on the Hollywood Walk of Fame on November 17, 2003 on Hollywood Boulevard in Hollywood, California. (Photo by Vince Bucci/Getty Images)
LOS ANGELES - DECEMBER 5: Singer Britney Spears performs at 102.7 KIIS-FM's 3rd Annual Jingle Ball at the Staples Center on December 5, 2003 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Throwback Thursday: Britney Spears
