Victim #4 -- I Blame DRAKE for Nightclub Brawl

Drake is solely to blame for inflaming the violent mob that severely injured several innocent people ... so says a 4th woman who was injured in the melee and is now threatening to sue the rapper.

TMZ has learned ... Innocent Victim #4, Vladimira Brace, has lawyered up -- claiming she suffered a spinal injury when she was trampled in the melee that ensued inside W.i.P. nightclub in NYC on June 13.

Brace's attorney has already fired off a letter to Drake's reps ... saying point blank, "Your client instigated a brawl with Mr. Chris Brown" ... and adds, "[Drake's] actions were reckless and negligent in inflaming a violent mob."

The letter continues, "My client personally observed several members of [Drake's] entourage throwing bottles of champagne with reckless and criminal disregard of the well-being of the innocent bystanders."

Brace's attorney, Allan Friedman, claims Drake has a "well documented history" of vulgar, abusive and profane remarks concerning women -- and notes, "It is regrettable that apparently many innocent young women have been severely injured by this incident."

Sources connected with Drake tell TMZ ... Friedman's allegations are "laughable." They say first of all, Drake was there with a couple of security guys and that was it. They note both Chris Brown and Meek Mill both had large entourages. They also say the notion that Drake has an abusive history of women is absurd on 2 counts. First, they say it's not true. Second, Chris Brown .... well, you know.