Punk'd, Omarion, Marques Houston, Andy Roddick, Jamie-Lynn Discala

Kirsten Dunst learns that friends don't let friends get Punk'd. Jesse Metcalf gets hung up on a role, and Michelle Rodriguez plays convenience store dominos. (S4, ep2)

Ashton aces Serena Williams with a car chase. Zach Braff gets scrubbed by co-star Donald Faison when his precious Porsche gets Punk'd. (S4, ep3)

Summer gets schooled when Rachel Bilson gets a wet and wild punk. Jadakiss jams to traffic when he gets Punk'd in the car. (S4, ep4)

Ashton lobs an overhead smash to Andy Roddick when he gets stuck on the way to the Tonight Show. Soprano's Jamie-Lynn Discala gives a bad tip and gets a waitress fired. (S4, ep5)

Jon Heder gets his tater tots in a twist when he accidentally visits a brothel! Ashton gets Chingy with it when the recording star gets a fan beaten up. (S4, ep6)

Life ain't so simple for Nicole Richie when she gets a waiter fired for hitting on her...(S4, ep7)