Last Night's Look: Hit or Miss?

Vote on this week's styles including Kate Beckinsale, Salma Hayek and more stars! You decide – are they fashionistas or flops?

JENNIFER LOPEZ

After a glamorous world tour, the singer relaxes in style, wearing a pleated white-and-tan vintage Prada frock and Lanvin tulle-topped flats while vacationing in St. Tropez, France.