Chris Brown and Drake are involved in another brawl ... this time legally.
They're suing one another over their nightclub fight last year, when the music stars and their posses got into an all-out MELEE at W.i.P. nightclub in NYC.
How does that work, exactly? Well, a French model named Romain Julien is filing suit against Brown, Drake and the club for injuries he says he sustained.
In response, both Drake and Chris Brown have filed legal documents basically denying blame for what happened and pointing the guilty finger at the other.