Last Night's Look: Hit or Miss?

Vote on this week's styles by Blake Lively, Mariah Carey and more stars! You decide – are they fashionistas or flops?

VANESSA WILLIAMS

What would Wilhelmina say? The Ugly Betty star ditches her crisp on-set high fashion for a sequin belted jumpsuit and puffed-up hair while promoting her album The Real Thing in New York City.