Avatar star Zoe Saldana wore skinny jeans, a stylish Isabel Marant blazer, and Christian Louboutin heels.
"America's Next Top Model" host, Tyra Banks sported a red and yellow number.
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Rihanna opted to slipped into Dior-designed ensemble with ankle socks.
Katy Perry donned a Sin City-inspired fashion faux pas by The Blonds.
Selena Gomez stole the spotlight in a yellow frock and gladiator sandals.
Miley Cyrus didn't walk on the orange carpet but she was spotted backstage in a simple tunic, textured jeggings, and zippered peep-toe booties.
"Glee's" Lea Michele opted for a yummy bubblegum-pink Zac Posen masterpiece and Cory Monteith went jeans and t-shirt from John Varvatos.
Justin Bieber posed in his signature 'do and loud sneakers.
Jonas Brothers looked quite suave in their sharp suits.
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