Lady GaGa in Alexander McQueen
Lady GaGa closed the show in a MEAT dress from Franc Fernandez
Nicki Minaj
Cher
Nicki Minaj
Cher
Ciara chose head-to-toe Givenchy
Ke$ha
Selena Gomez in a dramatic silver dress from Reem Acra
Katy Perry in Marchesa, Jimmy Choo shoes and a Swarovski clutch
Ashley Greene in Giambattista Valli accessorized with Jimmy Choo shoes and Ofira jewelry
Emma Stone
Rosario Dawson
Maria Menounos
Jenni "Jwoww" Farley from MTV's Jersey Shore
Jenni "Jwoww" Farley from MTV's Jersey Shore
Nicole "Snooki" Polizzi from MTV's Jersey Shore
Audrina Patridge in a sparkly minidress from Isaac Mizrahi and Balmain strappy sandals
Lo Bosworth in a gold Gabriela Cadena dress
Stephanie Pratt in a floor-length dress by Nicole Miller
Roxy Olin
Justin Timberlake
Usher and Justin Bieber
xoxo Elina