Maybe he was having a bad day???
Justin Bieber played a troubled teenager twice on the police procedural CSI over the past year, and according to series star, Marg Helgenberger, the pint-sized pop star acted a little more than inappropriate during his time on the set!
"I probably shouldn't say this, but he was kind of a brat. He locked one of the producers in a closet. And he put his fist through a cake that was on the craft services table."
Not very professional, Sir!
Let's keep the cake-punching and producer-locking to a minimum the next time we film a guest appearance on a television show, shall we?!
LOLz! Seriously, did he really do that stuff?!
[Image via WENN.]