December 31, 2011 Photos | Ke$ha, Chris Brown Heat Up The Us Hot Hollywood Party Edit Delete Tags Autopost Ke$ha, Chris Brown Heat Up The Us Hot Hollywood Party Related Artists Ke$ha Source: http://www.mtv.com/photos/keha-chris-brown-heat-up-the-us-hot-hollywood-party-/1652662/5441741/photo.jhtmlHeidi Montag Hilarie Burton Hilary Duff Hilary Swank Isla Fisher Ivana Bozilovic Ivanka Trump Izabella Miko Izabella Scorupco Jaime King Jaime Pressly Jamie Chung Jamie Gunns Jamie Lynn Sigler Janet Jackson