Two tracks believed to feature on US rapper Lil' Wayne's new album have appeared online ahead of their official release.

One song, 'Hot Revolver', demonstrates Lil' Wayne's move towards rock music, while the other, 'Troublemaker', is a more traditional hip-hop record which is thought to have been produced by The Neptunes.

The leak occurred just hours after the rapper's new single 'Prom Queen' emerged on the internet ahead of its official launch.

The song is the first track from Lil' Wayne's new rock album, 'Rebirth', which is due to be released in April.

The rapper was due to perform 'Prom Queen' live for the first time last night (January 28th) at a concert in San Diego.

(by Jason Gregory)