CSI star calls Justin Bieber a 'brat'

Teen pop star Justin Bieber has been called a "brat" after his backstage behaviour while filming CSI. During a French radio interview, actress Marg Helgenberger opened up about the mischievous things the 17 year-old got up to when he was a guest star on the crime drama series. The actress said: "I shouldn't be saying this, but he was kind of a brat." She added: "He was very nice to me. But he locked one of the producers in a closet." Bieber also allegedly put his fist through a cake that was on the cast's table. But Helgenberger did praise the U Smile singer's talent. She added: "He'd never acted before. He is better than you'd think.".