Last Night's Look: Hit or Miss?

Vote on this week's styles including Demi Moore, Anne Hathaway and more stars! You decide – are they fashionistas or flops?

RIHANNA

It's coming up roses for the singer, who blooms in a floral ankle-grazing dress and nude pumps at the signing of her new coffee table book, Rihanna, at a Barnes & Noble in N.Y.C.