Actor/singer Ray J was reportedly involved in an altercation with New York rapper Fabolous last night (Sept 18) in Las Vegas.

Fabolous and comedian Kevin Harts’ allegedly jokes about Ray J’s performance on Floyd Mayweather’s “24/7? HBO special set Ray J off.

Up to the time of this story Fabulous Tweeter timeline had the tweets below.

“N*gga Ray J doin a concert in his living room… Lmaoooooo”

“Nah but Floyd saying we havin a concert in my living room & the camera cuts to Ray J singing “One Wish” on the piano had me in tears!!”

“Get it..? Ray J concert in the living room!! *Lil Wayne voice*”

“Jus ran into my n*gga @RayJ at @iamdiddy dinner.. He told me & @KevinHart4real that it was a f*cked up edit & b*tches was there!!” (Fabulous Twitter)

Initial reports suggest that Fabulous and Ray J was fighting backstage at Ray J’s concert at The Palms in Vegas.

An obviously furious Ray J called into the Breakfast Club to talk about the incident.

Listen audio clip below.