Justin Bieber left his manager red faced on Sunday night by taking over his Twitter.com account and telling his 1.6 million followers his boss wet the bed.

The Baby hit-maker took the chance to mock his mentor Scooter Braun after finding his page on the website open.

Tweeting Braun's fans, he wrote: "hahaha. look who left their twitter open by mistake! priceless. I LOVE JUSTIN. He is the greatest. I wish i had more hair. PRANKED."

He then added, "i wet the bed...often."

Finding his teen client had made a fool of him, Scooter took back control of his account - and promised to get his revenge.

He wrote, "not cool. for my friends..that wasn't me. 18 year old kid snatched up my twitter. I apologize. I'm back. I only wet the bed sometimes. and yes...revenge will be mine."

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