Kevin Federline broken up over performance

LOS ANGELES, Sept. 1 (UPI) -- Rapper Kevin Federline is allegedly broken up over poor reviews of his debut rap performance at the Teen Choice awards.

"He was actually crying," a source told Us Weekly, adding the next day, at home in Malibu, Calif., Federline's wife Britney Spears, "also cried for him ... She didn't leave him alone all day."

But another told Us weekly the two were "thrilled" because the performance landed K-Fed another gig in October.

He'll be guest-starring on CBS's CSI as the leader of a violent gang.

The episode's writer, Dustin Abraham, tells Us: "He has this cockiness and confidence that I like. But I told him ... he needs to be the guy that you hate. It's the perfect role."

"There wasn't a lot of acting -- more beating (people up)," Abraham says. "I thought he was awesome."