Lady GaGa, RedOne write song for new Cher album

Cher has revealed that Lady GaGa has written a song for inclusion on her latest album.

The 'Believe' singer is currently working on her first studio album since 2001's Living Proof. She tweeted news about a collaboration with GaGa, saying that she is now hoping for a possible duet.

The track, titled 'The Greatest Thing', was co-written by GaGa's producer RedOne.

Cher wrote: "I have something tell u that's so great I don't know exactly how 2 say it! Been keeping it secret 4 long time. Just walked in from studio... Finished 1st track on new cd &........'Gaga' 'You Are The Greatest Thing To Me. (sic)"

She later added: "It's not a duet! Who knows? One can wish! It's one of her songs & she & Redone gave it to me 4 my cd! I would love duet with GaGa, but she gave me Great song & I'm beyond grateful!!!! It's called 'The Greatest Thing'."

Cher recently promised fans on Twitter a "big" new album.

Cher starred in the film Burlesque last year and won a Golden Globe for her song 'You Haven't Seen The Last Of Me'.

Watch the video for Cher's 'Believe' below: