What happens in Vegas on The Hills doesn't stay in Vegas. And there was some major drama that brewed on last night's episode. Unfortunately, the tension between Audrina and Lo has now affected the friendship between Audrina and Lauren. The two girls didn't even say hello to one another at Frankie's birthday. I bet Lo's thrilled. Stephanie went along for the Sin City ride but wasn't exactly welcomed by Brody. He even made her cry! So not cool. Oh, and Heidi's sister Holly moved in with her and Spencer. We only have to wait until tonight to find out how it all pans out, but in the meantime, I hope you were paying attention to last night's fashions.

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Photos courtesy of MTV