Lady Gaga To Duet With Cher

Last week we reported that Lady Gaga had given one of her songs, "The Greatest Thing," to Cher for the icon's upcoming album. Now it appears that Gaga is lending her vocals to the track as well. Cher tweeted, "Can't wait till GaGa puts her Voice on "The Greatest Thing" SHE WILL ROCK IT SO FKNG HARD!"

Gaga and Cher on the same track? Our heads are already exploding. Check out this demo of Gaga singing "The Greatest Thing" while we vacuum up the gray matter splayed across our floor:

Previously > Glee's Darren Criss to "Succeed" Daniel Radcliffe