Madonna says her "true fans" didn't leak her new song.

New track 'Gimme All Your Love' surfaced online yesterday (08.11.11), and the singer has put out a plea for fans to stop sharing it, claiming it is an incomplete demo version.

Her manager, Guy Oseary, said in a series of tweets: "Madonna told me this morning 'my true fans wouldn't do this'... whoever is responsible for this leak, we ask that you please stop! (sic)

"I'm very happy with the positive reaction to the demo, but we are very upset with whoever leaked the song!!!!!!!! (sic)

"We are asking that the fans please help us police any more leaks.. we have a lot in store for you.. but please respect the process (sic)."

He also claimed the '4 Minutes' singer is still working on her 12th studio album and that it will include a "beautiful" ballad, which she originally wrote for her 'W.E.' movie.

He added: "No name for new album yet.. the album is not finished.. it should be done in the next month or so... not sure how many tracks yet. There is beautiful ballad she wrote for the movie (sic)."

Among the people confirmed as working with Madonna on the album are DJ Martin Solveig who is thought to have produced 'Gimme All Your Love' and William Orbit, who produced tracks on her 'Ray of Light' album in 1998 and 'Music' in 2000.