Kim Kardashian's ex-boyfriend Ray J got involved in a brawl early Friday at a West Fest concert after insults were allegedly thrown about.

Ray J ended up in a fight after he had an argument with the niece of one of his former bosses, Death Row record label founder, Suge Knight, according to a report by celebrity news website TMZ.

Ray J was inside a dressing room at Club Nokia in downtown Los Angeles for a West Fest concert, but allegedly ended up in a quarrel with Knight's niece, Paulie.  Several rap legends performed at the venue - rappers E-40, Mack 10, Warren G and Too $hort among others.

An onlooker told TMZ that Paulie yelled at the singer, "You said f**k me fat bitch!" which was not caught on video.

TMZ obtained a video of Paulie yelling at Ray J after he insulted her. In the clip, he is trying to calm her down as she says: "I'm the bitch they went to go get to whup bitches ---a--es."

"Why you callin' me all these b-tches for blood," she said after she referenced Knight. "Ask bloods about me, blood. Ask any n---a you f--- with about me, blood. I do this sh--, blood" and "I ain't no fake-ass n----r from Carson," she added of her Blood gang affiliation.

"Alright, alright...calm down," Ray J tells her as she continues to hurl insults at him.

The video quickly cuts to Ray J fighting an unidentified man one-on-one until security arrive and pull them apart. The woman is also seen fighting a man.

No one was arrested and reps for Ray J and Suge Knight have yet to comment on the matter.

Ray J is a former child star who became more famous after he recorded a sexual romp with his then-girlfriend Kim Kardashian in 2003. When the sex tape went public in 2007, Kardshian became an overnight sensation and landed the reality show gig, Keeping Up With The Kardashians, with E! several months after. Ray J later landed his own reality show, For The Love Of Ray J.

Kardashian, who is five months pregnant and dating rapper Kanye West, appears alongside Ray J's sister, Brandy, in the upcoming film, Tyler Perry's Temptation: Confessions of A Marriage Counselor.

Last month, Ray J expressed sadness over the one year anniversary of the death of Whitney Houston.

"1 year ago I lost my heart. I would give anything just to see you smile again," the R&B singer tweeted. "I love u so much and I miss you even more today. RiP- Nippy."

Watch Ray J fight after his alleged 'Fat Bitch' insult.