Leather plus attitude equals one hot shoot. Plus: Gwen & Gavin, Jessica Simpson, Paris Hilton and more

DIVA DUO

They're tight: Jennifer Lopez and Beyoncé suit up in leather on the set of their new commercial for Pepsi, which will premiere in Madrid later this month. But U.S. viewers won't be seeing it: The clip (which also stars David Beckham) is only airing overseas.