Despite being able to charm the pants off of millions of teenage girls worldwide, it turns out that teen pop star Justin Bieber doesn’t have quite the same effect on women who are more than twice his age. Just ask CSI star Marg Helgenberger who claims he’s actually a bit of a pain in the butt.

Bieber made his fictional TV debut with a two-episode arc on “CSI” last year, and according to co-star Helgenberger, the kid who played a troubled teen was, off-camera, a trouble-making teen.

“I shouldn’t be saying this but he was kind of a brat [on the set],” Helgenberger told French Magazine Le Grand Direct Des Medias. “He was very nice to me,” she continued, “but he locked one of the producers in a closet.”

Upon hearing of  Marg’s rather unflattering comments … Bieber ran to his Twitter page where the  young Pop sensation tweeted a few comments of his own.

“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.”

Guess the tiny tot didn’t take too kindly to Marg’s opinion of him!

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