The latest treat from Kanye West's bag of surprises is an appearance on 'Late Night with Jimmy Fallon.' The 'Yeezus' creator was in town for New York Fashion Week and decided to do an unscheduled performance on the show with Charlie Wilson Monday night (Sept. 9).

The duo performed the 'Yeezus' soulful closer 'Bound 2' with help from the Roots and some young singers on backup vocals. The song was performed minus the EDM breaks, which made Wilson's famously powerful voice stand out more as he sang his lines and ad-libbed a few more.

West breezed through his verse but began his performance editing his opening line -- "All them other n----s lame, and you know it now" -- into a diss.

“Brandy little sister lame and you know it now,” West raps, directly referencing Ray J.

Ray J became known for his explicit tryst with West's current girlfriend, Kim Kardashian. He also released a song entitled 'I Hit It First' earlier this year, which is a pretty obvious reference to the prior relationship he had with Kardashian.

The G.O.O.D. Music leader also obliged when host Jimmy Fallon offered him a handshake for his performance. When the rapper made his 'Saturday Night Live' appearance earlier this summer, West didn't look very open to greetings during the show's famed closing sequence.

Last week, West announced that he was going back on tour -- his first solo trek in five years. Tickets go on sale this Friday (Sept. 13).