Last Night's Look: Love It or Leave It?Check out the head-turning outfits Selena Gomez, Heidi Klum and more stars were just spotted in! Then decide – fabulous or fashion faux pas?

CAMERON DIAZ

A simple Rachel Roy LBD gets a boost via an asymmetric hem and neckline, which the actress accents with a gold choker and ankle-strap heels for the Pioneer Awards in Las Vegas.