Shanna Moakler vs. Paris Hilton

Disputes over exes are pretty common in Hollywood. And when you hook up with as many guys as Paris Hilton has, you're bound to run into a few. Meet the Barkers star, Shanna Moakler was furious when she found out that P.Hilton was hooking up with her estranged hubby, Travis Barker. One night in October, Shanna and Paris had it out at a club in L.A. What really happened is up for debate: Paris says Shanna socked her in the jaw and screamed obscenities at her, while Shanna says that Paris' ex, Stavros Niarchos poured a drink over her head and shoved her down some stairs. (Each girl filed a police report about the incident.) Shanna even aired her anger on MySpace, calling Paris a "drug obsessed clown." All this over a guy who streaked in a music video!