Jesse McCartney Caught Up in Biker Gang Prank on Punk'd  7/12/05

US pop pin-up Jessee McCartney was left scurrying for safety in the backseat of his limousine when pal Ashton Kutcher pulled one of his most dramatic Punk'd pranks on him.

The She's Not You singer was on his way to a show at Beverly Hills High School in Los Angeles when his chauffeur drove into a line of motorbikes.

And when a bunch of menacing, tattooed bikers came to claim their motorcycles, McCartney ran for cover, saying, "I just don't wanna get hurt."

The blonde pop star was in tears as the bikers started banging on the windows of the limo.

When Kutcher showed up, a relieved McCartney jumped out of the back seat and started attacking the practical joker.