Last Night's Look: Hit or Miss?

Vote on this week's styles including Sienna Miller, Nicole Richie and more stars! You decide – are they fashionistas or flops?

SIENNA MILLER

Another day, another fabulous look! Miller channels old Hollywood glam in her lizard print silk chiffon YSL gown, H. Stern jewels and retro beauty for the Hollywood premiere of G.I. Joe: The Rise of the Cobra.