Marg Helgenberger of 'CSI' Calls Justin Bieber a 'Brat' (Watch Video)

"CSI: Crime Scene Investigation" star Marg Helgenberger says teen pop star Justin Bieber threw a teen tantrum while on the show's set back in July. The 52-year-old hottie was being interviewed by a French radio station in Paris when she spilled the beans about Bieber's behavior.

The radio show host asked Helgenberger to dish about the rumored on-set antics and she replied, "I shouldn't be saying this but he was kind of a brat. He was very nice to me. But he locked one of the producers in a closet and he put his fist through a cake that was on the cast’s table."

The interviewer also insinuated that Bieber was only appearing on the show to raise ratings, rather than because he was actually any good at acting. The blonde beauty told the live audience, "Justin Bieber wasn't bad bad. But he'd never acted before...He's better than you'd think."

The 11-year "CSI" veteran also revealed that while she will be returning next season, she will not be included in the entire season. She only confirmed that her character will be in "several episodes," also mentioning that her absence has nothing to do with salary disputes.

Watch the interview now:

Justin Bieber, "un sale gosse" chez Les Experts by Europe1fr