Bieber230.jpgJustin Bieber has taken to Twitter to defend himself after CSI's Marg Helgenberger called him a "brat" in an interview.

"I shouldn't be saying this, but he's kind of a brat," Helgenberger told a French radio station. "He was actually very nice to me, but he locked one of the producers in the closet. And he put his fist through a cake that was on the table."

Bieber made a cameo on CSI last season. But the 17-year-old Biebs dismisses such on-set antics as harmless pranks, and Tweeted responses to the actress' comments.

    "It's kinda lame when someone you met briefly and never worked with comments on you. I will continue to wish them luck and be kind."


    "I know who I am and sometimes people r just going 2 say what they want. Keep ur head up and be the man ur mama raised."


But, is the Biebs really a "man" yet? After all, he's only 17 ... and his antics seem to reflect as much. Last week Bieber made headlines when he was late to sit in his seat on an airplane. The flight attendant scolded Bieber, later saying, he "had been acting like a child and would therefore be treated like one."

Last May, the Biebs supposedly swore at the manager of an Australian TV show, and in September he reportedly was almost arrested for throwing a water balloon at a state trooper's crotch in Maryland.

The Biebs got a dose of his own prank medicine at the end of April when a concertgoer -- who was also 17, just like the Biebs -- threw eggs on stage at his show. That individual though, is getting charged -- with trespassing, breaking and entering and malicious damage.

See what Helgenberger had to say about Bieber's acting ability after the jump.