Kanye West Fires Back At Ray J Over 'I Hit It First' During Performance.

Kanye West dropped by "Late Night With Jimmy Fallon" for a surprise performance of "Bound 2," and he changed the opening lyrics to slam his girlfriend Kim Kardashian's ex-boyfriend and sex tape partner, Ray J.

"Brandy’s little sister lame man he know it now/ When a real brother hold you down, you supposed to drown."

Ray J, who is the younger brother of singer and actress Brandy, met Kardashian when she was working for his sister as a stylist back in the mid-2000s and would go on to help propel her to stardom when their sex tape went public in 2007.

West's lyrical diss appears to be the rapper finally responding to Ray J's song, "I Hit It First," the video for which was released back in April and featured a Kardashian look-alike.