Lady Gaga Set To Duet With Cher On Track 'The Greatest Thing'

Lady Gaga will duet with Cher on track 'The Greatest Thing', it has been announced.

The track is written by Lady Gaga and producer RedOne and will appear on Cher's forthcoming new album.

Cher revealed that Gaga would now duet on the track, telling fans over Twitter: ''Can't wait till GaGa puts her Voice on "The Greatest Thing" SHE WILL ROCK IT SO FKNG HARD! (sic)"

An early demo version of 'The Greatest Thing' appeared online last year.

Meanwhile, Lady Gaga has been criticised by disability groups after she performed in a wheelchair at a gig in Sydney last week (July 13).

Lady Gaga - live photos