Last Night's Look: Hit or Miss?

Vote on this week's styles including Rihanna, Kim Kardashian and more stars! You decide – are they fashionistas or flops?

BLAKE LIVELY

Taking a nod from onscreen character Serena van der Woodsen, the Gossip Girl star goes for all-out sex appeal in her plunging Versace teal chiffon evening gown paired with crystal-detailed Versace sandals, Lorraine Schwartz rings and a VBH clutch at the Costume Institute Gala.