It's rumoured the two were recording songs in a Paris hotel with Kanye West for 'Watch The Throne', the joint album he and Jay‑Z have been working on since last year.
Specifically, the three were working on 'Lift Off', which is also set to feature vocals from serial hat-botherer Bruno Mars.
The track's co-producer Jeff Bhasker confirmed the song's title on Twitter but has since gone on to say that he's not exactly sure when the song will be out. "For the record," he says, "I don't know what the next single off WTT will be. I don't know who will end up on Lift Off. I do know it's dope as fuck."
So there you go.