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OTRC: Justin Bieber was 'kind of a brat' on 'CSI' set says actress Marg Helgenberger

Justin Bieber and Marg Helgenberger appear in different scenes from 'CSI.' (CBS)

Justin Bieber got to flex his acting muscles on the set of "CSI: Crime Scene Investigation" this season when he played troubled teen Jason McCann. However, the show's lead actress, Marg Helgenberger, who has played crime-scene investigator supervisor Catherine Willows on the show for 11 seasons, claims that the teen heartthrob misbehaved a little when he was on set.

"I shouldn't be saying this, but he was kind of a brat," Helgenberger said during an interview with French radio show "Le Grand Direct des Médias" on Friday, according to the New York Daily News.

"He was very nice to me," she explained. "But he locked one of the producers in a closet. And he put his fist through a cake that was on the craft service table."

Bieber's character met his end in February when he was gunned down by several officers including Nick Stokes, played by George Eads. Bieber appeared in two episodes of the long running drama.

"He's kind of like a bad kid," Bieber described his character in a promotional interview posted on the show's website back in September. "I think the fans will like it. It's going to be fun. There's two episodes that I'm doing. It's high energy. Watching CSI growing up was really fun for me. Me and my mom, just sitting in our apartment. Now that I'm on it, it's pretty cool. The hardest part is remembering the lines because they keep changing them."

Helgenberger did compliment Bieber's acting efforts. "He'd never acted before," she said, "he's better than you'd think."

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