(CBS) Not everyone has a case of "Bieber fever." "CSI" co-star Marg Helgenberger called the teen popstar a "brat" after the two worked together last year.
Bieber made hison two episodes of the CBS drama series.
In an interview with French Magazine Le Grand Direct des Medias, Helgenberger admitted, "I shouldn't be saying this but he was kind of a brat [on the set]."
"He was very nice to me," she continued, "but he locked one of the producers in a closet."
Bieber also "put his fist through a cake that was on the craft service table."
Despite his off-screen antics, the Hollywood Reporter notes, Helgenberger admired Bieber's acting skills.
"He's actually better than you'd think," she said.
This isn't Bieber's only acting experience on-screen. The popstar starred in the hit concert documentary "Never Say Never." According to the Huffington Post, Bieber is reportedly in talks with "The Fighter's" Mark Wahlberg about an upcoming film.