"CSI" star Marg Helgenberger called pop star Justin Bieber a "brat," basing her opinion on his behavior when he was on the set of the CBS show for a guest-starring role, according to The Hollywood Reporter. The piece cites an interview she did with a French publication.

"I shouldn’t be saying this but he was kind of a brat [on the set]," Helgenberger said. She added that he locked one of the producers in a closet and also "put his fist through a cake" that was set out on the craft service table.

Helgenberger complimented his acting, however, noting, ""He’s actually better than you’d think."