It was Justin Bieber's world and this guy just guarded it. But no more.

A former personal bodyguard for the "Boyfriend" singer is suing him for assault and battery and wages after a backstage incident where Bieber allegedly lost his temper and punched him repeatedly in the chest and then fired him.

According to the complaint, filed in Los Angeles Superior Court and a copy of which was obtained by E! News, Moshe Benabou claims he's owed $421,261 in unpaid wages, unspecified damages and court costs after working overtime to protect the pop star.