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Justin Bieber has hit back at claims that he acted like a 'brat' on the set of CSI.
The singer took to Twitter after actress Marg Helgenberger accused him of misbehaving during filming for two episodes of the US crime show.
'I shouldn't be saying this but he was kind of a brat,' she told French radio network Europe 1.
'He was very nice to me. But he locked one of the producers in a closet and he put his fist through a cake that was on the cast's table.'
But Bieber hit back on his Twitter page.
'It's kinda lame when someone you met briefly and never worked with comments on you,' he wrote.
'I will continue to wish them luck and be kind.'