Well, TMZ obtained footage of the Vegas nightclub brawl, which shows Ray J arguing with Fab — who is off the screen — while 50 Cent stands in between them with a big grin on his face.

According to the gossip site, Fif had encouraged the singer/reality star to confront Fabolous about their recent Twitter feud — and he finally decided to get in Fab’s face at Moon nightclub inside The Palms casino.

However, when things got physical 50 actually jumped in to break things up … which eventually got Ray booted from the club.

While Ray told The Breakfast Club radio show he punched Fab in the face, Fab claims is was a brief shove which was immediately broken up.