Celeb Fashion Hit or Miss

Vote on this week's styles from Mary-Kate Olsen, Rihanna, Blake Lively and more stars! You decide – are they fashionistas or flops? By Melissa Liebling-Goldberg

NATALIE PORTMAN

The actress attends an Alberta Ferretti-sponsored private screening of The Other Boleyn Girl in a low-cut purple velvet dress by the designer.