Kanye West stopped by "Late Night with Jimmy Fallon" on Monday for a surprise performance and fired back against Ray J's song referencing that he was first with West's now wife, Kim Kardashian (a fact we all know, of course, as the former couple a sex tape). The Hollywood Gossip reported that West took center stage and opened the song "Bound 2" with, "Brandy's little sister lame man he know it now/When a real brother hold you down you 'sposed to drown."

West has been spotted making solo appearances throughout New York Fashion Week, sitting front row at some of the week's most exclusive shows including Alexander Wang and the Hood by Air show at Milk Studios.

Check out the video below.

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