The Insider.com

His new movie may be called The Lucky One, but when squeaky clean Zac Efron has a scrape with Johnny Law, it's all captured on tape -- and it's not pretty. Lucky for him, he's just being Punk'd by good friend Hayden Panettiere…

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Zac Efron's Star-Studded Saturday

"Oh my god, this is how it all ends," Zac mutters to himself as his cuffed friend puts up a fight with the cops and the former High School Musical star is forced to explain himself. See, it all started with a lady who tossed a bag of dog poo on their windshield, which may have escalated into a hit-and-run…

Hayden hosts Thursday night's Punk'd episode (airing at 10/9c on MTV), which also finds Snooki and Glee star Dianna Agron in the crosshairs.

Hayden's Streaker Shock

Back for its ninth season, Ashton Kutcher is passing the Punk'd torch to a different celebrity host each week, including Justin Bieber, Miley Cyrus, Kellan Lutz, Bam Margera and Punk'd alum Dax Shepard, among many others, who punk their unsuspecting famous friends.