After wait so much time specting to hear it, 'The Greatest Thing' by Cher featuring Lady Gaga has leacked on the web earlier today. This song was produced by RedOne and written by Gaga herself. This song was going to be Cher's first single, but Gaga was not satisfied with the song so it didn't make the cut on her album. Listen below!

UPDATE: Cher tweeted that this is not the final version of the song! But we love it