bieberbodyguard011113.jpg This doesn't sound very plausible, but you never know!

Justin Bieber's former bodyguard Moshe Benabou claims in a new lawsuit that the pop singer beat him up during an October confrontation.

JB's former employee alleges that the "Boyfriend" crooner repeatedly punched him in the chest during an argument about one of the members of the teen sensation's entourage, then fired him after the confrontation was over.

In addition, Benabou maintains he was denied overtime despite 14 to 18 hours days between March 2011 and October 2012, so he is now seeking unspecified damages on the assault and battery claims, as well as $421,261 in unpaid overtime, vacation and other wage benefits.

"For nearly two years Mr. Benabou devoted himself completely to ensuring Mr. Bieber's personal safety. Mr. Benabou deserved, as does any employee, to be treated with respect, dignity and in accordance with the law. Unfortunately, he was not," his lawyer said in a statement.

Not true, according to insiders...

"This whole thing is baseless and meritless. Justin never hit him and couldn't! He is so much smaller. This whole thing is a lie," a source told Us.

Guess we'll have to wait and see what the judge says!