A little hile back Justin Bieber tried his hand at acting by being a guest star on CSI and now some chick who works on the show says that he was a "brat" when he was on the show. Of course this Marg Helgenberger chick would probably do anything to get some press from the tabloids as her life on CSI is lackluster at best. She is also probably still pissed off that her parents named her Marg because let's face it, the only other chick in the world named Marg is a janitor at a school in one of the square states.