Troubled pop star Justin Bieber has risked more controversy by hurling a foul-mouthed remark at a female court worker during an interview.

The Baby hitmaker is already facing severe criticism over his behaviour when he was quizzed by lawyers earlier this month (Mar14) over a photographer assault case.

Footage shot at the hearing shows Bieber growing increasingly petulant as he is asked questions about his life and career, and a new clip obtained by shows the moment the star blew his top.

After mumbling the answer 'Yes' to a question, Bieber snaps when a female worker politely asks him, "I'm really sorry to keep asking you this but can you please speak up?"

The singer responds, "I think 'Yes' and 'No' are f**king pretty, pretty different."

His lawyer immediately tries to quieten the star and places a hand on his arm as the legal teams agree to take a short break.

The testimony hearing in Miami, Florida on 6 March (14) was held in connection with photographer Jeffrey Binion's lawsuit, in which he accuses Bieber's bodyguard of choking him and ordering him to delete images from his camera.