Last Night's Look: Hit or Miss?

Vote on this week's styles including Ashlee Simpson-Wentz, Jessica Alba and more stars! You decide – are they fashionistas or flops?

MARY-KATE OLSEN

The pint-size designer sticks to her version of the basics in a long tan coat, skinny jeans and funky ankle booties for a cocktail party celebrating the Tribeca Film Festival in Hollywood.