CSI Star: Justin Bieber Is a Brat

Pop star Justin Bieber may have millions of screaming fans, but CSI star Marg Helgenberger apparently isn't one of them. "I probably shouldn't say this, but he was kind of a brat," Helgenberger told French radio on Friday. Bieber starred in a multi-episode arc on the long-running CBS procedural, and while Helgenberger says the singer was very nice to her during their one scene together, she also reveals that Bieber punched a cake and locked a producer in his closet, reports the New York Daily News. Click to read her thoughts on Justin Bieber's acting skills.

The Bieber fired back at the swipe via Twitter, notes Perez Hilton: " 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. #killemwithkindness " (More CSI stories.)