It was a relatively positive, quiet week for Justin Bieber ... but you knew it wasn't going to stay that way for long. The 'Heartbreaker' singer is accused of picking a fight with EDM DJ Michael Woods' manager. C'mon, Biebs! You're killin' us!

Woods took to Twitter to slam Bieber, who reportedly got into a verbal argument with Woods' tour manager over a hip-hop song request at a club in Seoul. Woods claimed that Bieber actually sucker punched his TM and then ran away!

"Next time u wanna take a cheap shot at my Tour Manager @justinbieber stick around to follow it thru instead of runnin off like a lil p----," Woods wrote. He added:

Then he explained further, writing, "So when I told @justinbieber to f--- off and put some clothes on he took a cheap shot at my tour manager and fled behind a wall of security."

However, sources at TMZ claim that Woods' report is greatly exaggerated. The host of the party that both Bieber and Woods attended, Ben Baller, says that Woods is making a mountain out of a molehill.

Baller did admit that a heated argument went down, but that the exchange ended there. In any case, Biebs did take over the DJ booth when Woods left ... and he did play hip-hop. The boy always wins!