For this edition of Who ROCKED IT, we have reality star, Kristin Cavallari vs. the diva, Beyonce:

Beyonce was first spotted, back in August at the press conference for Jay-Z’s 9/11 benefit concert @ MSG, rocking this 3.1 Phillip Lim zipper skirt from the Spring 2009 collection. She wore it with a simple black tank and a black and gold belt. While “The Hills” star, Kristin, wore the zipper skirt last week while attending Us Weekly’s Hot Hollywood Party. She paired the skirt with a Dolce & Gabbana bustier and a black belt.

I’m actually torn between the two outfits. So what do you think? Who ROCKED IT?