Two-time Grammy Award winner Kelly Clarkson and punk-pop dynamo Avril Lavigne are set to perform on "Teen Choice 2007" Sunday, Aug. 26 (8:00-10:00 PM ET live/PT tape-delayed) on FOX.

Clarkson will perform the emotionally charged single “Never Again” and Lavigne will sing her infectious hit “Girlfriend."

As previously announced, Hilary Duff and Nick Cannon will co-host the ninth annual special, where the coolest stars will receive coveted Teen Choice Surfboard awards.

-Avril Lavigne Pictures
-Kelly Clarkson Pictures