Justin Bieber has responded to the accusations that he was a "brat" by CSI's Marg Helgenberger. 

The crime series actress described the 17-year-old superstar as "kind of a brat" during an interview with French radio station 'Le Grand Direct des Medias' and revealed how during his cameo appearance he "locked one of the producers in a closet" and "put his fist through a cake". 

Upon hearing this, the 'Baby' hitmaker took to social networking site Twitter and wrote (May 9):

"it's kinda lame when someone you met briefly and never worked with comments on you. I will continue to wish them luck and be kind."

Watch Helgenberger tell all about Bieber's on-set attitude here: