Last Night's Look: Hit or Miss?

Vote on this week's styles including Jessica Alba, Kim Kardashian and more stars! You decide – are they fashionistas or flops?

RIHANNA

Forget the fierce fashion! The style star is down right glamorous in a metallic blue ombré strapless dress by Christian Siriano and bold gold accessories – including House of Lavande crystal earrings – at the Pepsi Refresh Project Party in Miami Beach.