Last Night's Look: Hit or Miss?

Vote on this week's styles including Christina Aguilera, Reese Witherspoon and more stars! You decide – are they fashionistas or flops?

MICHELLE TRACHTENBERG

It's all about the accessories for the Gossip Girl star, who looks perfectly geek chic in a SMYTHE pouf sleeve equestrian jacket at a Trevor Project event in Universal City, Calif.