So, apperantly not everyone is a fan of the BIEB??  CSI star Marg Helgenberger had a few things to share about him when he was on set for a taping of the show.  "I probably shouldn't say this, but he was kind of a brat," Helgenberger told French radio on Friday. Bieber starred in a multi-episode arc on the long-running CBS procedural, and while Helgenberger says the singer was very nice to her during their one scene together, she also reveals that Bieber punched a cake and locked a producer in his closet, reports the New York Daily News.