Christina Aguilera in 2011 (Photo by Tim Alban/Getty Images)
Christina Aguilera in 2016 (Photo by Jason Kempin/Getty Images)
Khloe Kardashian in 2008 (Photo by Frazer Harrison/Getty Images)
Khloe Kardashian in 2017 (Photo by Dia Dipasupil/Getty Images)
Perez Hilton in 2006 (Photo by Evan Agostini/Getty Images)
Perez Hilton in 2017 (Photo by Ari Perilstein/Getty Images for Feld Entertainment)
Kelly Osbourne in 2002 (Photo by Frazer Harrison/Getty Images)
Kelly Osbourne in 2016 (Photo by Tommaso Boddi/Getty Images for The Trevor Project)
Jonah Hill in 2008 (Photo by Michael Buckner/Getty Images)
Jonah Hill in 2011 (Photo by Jason Kempin/Getty Images)
Jason Segel in 2008 (Photo by Frederick M. Brown/Getty Images)
Jason Segel in 2016 (Photo by Jason Merritt/Getty Images)
Leona Lewis in 2014 (Photo by Frederick M. Brown/Getty Images)
Leona Lewis in 2017 in (Photo by John Sciulli/Getty Images for Moet)
Jennifer Hudson in 2006 (Photo by Gareth Cattermole/Getty Images)
Jennifer Hudson in 2017 (Photo by Michael Loccisano/Getty Images)
Ricky Gervais in 2006 (Photo by Jo Hale/Getty Images)
Ricky Gervais in 2014 (Photo by Jason Kempin/Getty Images)
Ethan Suplee in 2002 (Photo by David Klein/Getty Images)
Ethan Suplee in 2013 (Photo by Stephen Lovekin/Getty Images for Giorgio Armani)
Melissa McCarthy in 2011 (Photo by Alberto E. Rodriguez/Getty Images for WIF)
Melissa McCarthy in 2016 (Photo by Frazer Harrison/Getty Images)
America Ferrera in 2002 (Photo by Frederick M. Brown/Getty Images)
America Ferrera in 2016 (Photo by Jamie McCarthy/Getty Images)
Sam Smith in 2014 (Photo by Rachel Murray/Getty Images for MTV)
Sam Smith in 2016 (Photo by Kevork Djansezian/Getty Images)
Holly Willoughby in 2013 (Photo by Tim P. Whitby/Getty Images)
Holly Willoughby in 2017 (Photo by Eamonn M. McCormack/Getty Images for Barclaycard)
Seth Rogen in 2007 (Photo by Evan Agostini/Getty Images)
Seth Rogen in 2017 (Photo by Frazer Harrison/Getty Images)
Chris Moyles in 2007 (Photo by Stuart Wilson/Getty Images)
Chris Moyles in 2017 (Photo by Eamonn M. McCormack/Getty Images for Barclaycard)
Adele in 2008 (Photo by Gareth Cattermole/Getty Images)
Adele in 2017 (Photo by Michael Kovac/Getty Images for NARAS)
Jordin Sparks in 2007 (Photo by Evan Agostini/Getty Images)
Jordin Sparks in 2016 (Photo by Alberto E. Rodriguez/Getty Images)
Charlotte Crosby in 2013
(Photo by Daniel Deme/WENN.com)
Charlotte Crosby in 2016 (Photo by Eamonn M. McCormack/Getty Images)
Tina Malone in 2006
(Photo by Mark ReadmanWENN)
Tina Malone in 2017 (Photo by WENN.com)
Scarlett Moffatt in 2016
(Photo by Tim McLees/WENN.com)
Scarlett Moffatt in 2017 (Photo by Anthony Harvey/Getty Images)
Holly Hagan in 2011 (Photo by WENN)
Holly Hagan in 2016
(Photo by Tony Oudot/Wenn.com)
Celebrity Weight Loss Transformations
