Last Night's Look: Hit or Miss?

Vote on this week's styles including Rihanna, Katie Holmes and more stars! You decide – are they fashionistas or flops?

CHRISTINA AGUILERA

The Grammy winner celebrates the opening of the new Resnick Pavilion at the Los Angeles County Museum of Art (LACMA) in a blush Atelier Versace halter-gown with an embellished waist accent and a bejeweled clutch before performing for the crowd.