Last Night's Look: Hit or Miss?

Vote on this week's styles including Fergie, Penélope Cruz and more stars! You decide – are they fashionistas or flops?

ASHLEE SIMPSON-WENTZ

The birthday girl is ready to party in her black overalls, mound of gold bangles, black-and-white fedora and sexy leopard-print sandals at her 25th birthday bash at the MGM Grand Hotel and Casino's Wet Republic pool in Las Vegas.