Last Night's Look: Hit or Miss?

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

KATY PERRY

Katy P. goes "Sandra Dee," channeling the Grease good girl in a pink full-skirted frock, baby blue angora cardigan and cat-eye frames in Manchester, England.