Kanye West gave some lucky Brits a holiday surprise when he previewed some of his new material during a DJ set. When a clip of 'Ye rocking out to his laptop surfaced online, many got excited about what they thought was  a collaboration between him and chart queen Rihanna. Turns out, the track doesn't feature either of them!In the clip, West grins, dances along to his laptop beats and talks animatedly with guests at the Le Baron nightclub fete. Based on his excitement, it's easy to assume he's talking about his new G.O.O.D Music project -- and maybe he is -- but this song isn't on it. The tune, called 'King of Hearts,' is actually by Diddy's protege (and maybe-sometimes-sort-of girlfriend), Cassie. Considering Rihanna and West had successful collaborations in the past ('All of the Lights,' 'Run This Town) and that on this particular track, Cassie's vocals do sound a lot like RiRi's, it's an understandable error.

While Cassie's 'King of Hearts' won't be on Yeezy's upcoming G.O.O.D Music compilation album, the project will feature other big names -- Big Sean, CyHi Da Prynce, Kid Cudi and Pusha T to name a few. West will collaborate not only with an impressive roster of rappers, but with noteworthy producers as well. Hit-Boy, who provided the beat to West's and Jay-Z's 'Watch the Throne' smash 'N-----s in Paris,' confirmed that he will appear on the compilation as well.

Watch Kanye West Play Cassie's 'King of Hearts'