First thing's first - the Backstreet Boys were there. They busted out I Want It That Way - because fashion doesn't take itself too seriously. Ahem.
Also front and centre last night we had Kylie Jenner (watching sister Kendall modelling the same outfit), and Lewis Hamilton. Coco Rocha was also front row, taking some of the best Instagrams of the night.
Now for a trip down memory lane, here are some snaps of the Backstreet Boys gig.
For the rest of you gunning on seeing the Balmain x H&M in all it's 100 piece glory, it can be viewed with a price by price breakdown here...
Now, who else has I Want It That Way stuck in their heads?