Celeb Fashion Hit or Miss?

Vote on this week's styles including Mary-Kate Olsen, Paris Hilton and more stars! You decide – are they fashionistas or flops? By Melissa Liebling-Goldberg

MARY-KATE OLSEN

The Wackness star channels Stevie Nicks in her batwing black vintage Halston dress and braided blonde hair as she enters The Late Show with David Letterman.