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
The Penelope star dresses up her dark AG jeans and white J. Crew tank with an ivory Stella McCartney vest, metallic gold Giuseppe Zanotti heels and Van Cleef & Arpels jewels for an appearance on TRL.