Audrina Patridge, Rumer Willis, Briana Evigan and Leah Pipes Photo

From: Photo Coverage: Teen Choice Awards 2009 - Arrivals

Miley Cyrus performed her newest single, 'Party in the U.S.A.,' at TEEN CHOICE 2009 last night. The performance filled show airs tonight, Monday, Aug. 10 (8:00-10:00 PM ET/PT) on FOX. Additionally, the casts of 'Twilight' (Robert Pattinson, Kristen Stewart, Taylor Lautner, Ashley Greene, Nikki Reed and Kellan Lutz) and FOX's new comedy series GLEE (Lea Michele, Cory Monteith, Jenna Ushkowitz, Chris Colfer,Amber Riley and Kevin McHale) will also guest on the two-hour special.