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

HEIDI KLUM

Leaving her bold red gown behind, the Project Runway host sizzles in a Roberto Cavalli silver sequined minidress at Elton John's afterparty.