Justin Bieber branded as a brat

Teen sensation Justin Bieber has been branded a 'brat' by CSI: Crime Scene Investigation actress Marg Helgenberger. She revealed that the singer played havoc when he made a guest appearance in the drama TV series and even locked up a producer in a cupboard and spoiled a cake.

“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," Marg revealed in an interview with France's Le Grand Direct Des Medias.

However, she is all praise for the singer for his acting skills. “Justin Bieber wasn't bad. He'd never acted before ... He's better than you'd think," she said.