While Justin Bieber is often commended for his professionalism and his squeaky clean image, the teen pop sensation -- who recently invited a bullied teen to visit him while on tour in Australia --  didn't exactly make friends with redhead actress Marg Helgenberger on the set of 'CSI.' The Biebs had a recurring guest role as troubled teen Jason McCann on the crime procedural last fall, and Helgenberger was a bit critical of the singer -- according to USMagazine -- handing out both a minor criticism and some praise.

"Justin Bieber wasn't bad," Helgenberger, 52, said when chatting with a French radio station. "He had never acted before. I shouldn't be saying this, but he's kind of a brat." A brat? Uh-oh. We predict that a legion of Beliebers are going to be calling for Helgenberger's head!

Helgenberger qualified her statements, "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." The actress actually commended The Bieb's acting chops, saying, "I am pretty open to whoever comes on the show. If someone is a jerk, that bothers me. If they're a so-so actor, it doesn't bother me. [Bieber] is actually better than you'd think!"

Okay, so he punches a cake and locks a producer in a closet, but he can still act. So what, right? That's what Justin himself, thinks about the "feud" anyway. Justin is quite quick tell his side of the story, via Twitter:

"It's kinda lame when someone you met briefly and never worked with comments on you," he writes. "I will continue to wish them luck and be kind." He adds, "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. #killemwithkindness." Right on Justin!

Watch Justin Bieber Talk About His Guest Spot on 'CSI'