The track, which has not been released on any album yet, is available for purchase on iTunes. Will it eventually end up on a full-length album? Maybe--but probably not on Kanye's next one, since Rihanna is the main artist listed on the track.

But Sir Paul and Yeezus have been spending quite a bit of time in the studio together; their Rihanna-free collab, "Only One," was released last month. The 57th annual GRAMMY Awards air live on Feb. 8 at 8 pm EST on CBS.