Lady Gaga Pens New Cher Track 'The Greatest Thing'

Cher has recorded Lady Gaga's penned track 'The Greatest Thing' for her new album.

The singer revealed that the track written by Lady Gaga and producer RedOne is not a duet but was given to her as a gift from Gaga.

Cher broke the news to fans over Twitter: "Just walked in from studio! Finished 1st track on new cd &......."GAGA" YOU ARE THE GREATEST THING TO ME."

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 night (July 13).

Lady Gaga - live photos