Met Gala 2013: Hollywood Gets Their Punk On!"Chaos to Couture" was the theme of this year's fashion prom, and stars from Beyoncé to Jennifer Lopez to Sarah Jessica Parker definitely didn't disappoint

CAMERON DIAZ

Cameron's look is deadly … literally. The actress stuns in a purple Stella McCartney gown with a matching floor-length, backless cape (yes, you read that right), plus a gold-spiked belt.