MADONNA has recruited an unlikely celebrity for her much-anticipated new album - former boxer Mike Tyson.

The pop star's forthcoming record, Rebel Heart, is slated for release on March 10, and a track list was leaked on iTunes on Monday, revealing the singer's most bizarre collaboration yet.

One of the 19 tracks, titled Iconic, features rising MC Chance the Rapper and retired heavyweight champion Tyson - but it is unclear what he does on the track.

Other duets of note include Nas on Veni Vidi Vici and Nicki Minaj on B---- I'm Madonna. The latter track has already been released by Madonna as part of a six-song EP she offered up to fans at Christmas after hackers got their hands on a number of Rebel Heart tracks and published them online.