Britney Spears and Heidi Montag made a duet together???

I was listening to a local radio station and heard that there was a Heidi Montag duet with Britney Spears. I was shocked, thinking, "That's a weird duet." Both stars appear on a new track, but I heard Britney did not authorize the release of the song. Britney had no idea about it until Heidi leaked it out. It seems that Heidi and Spencer got a hold of an old demo recording of Britney's that never made it to her album. One of the producers, that used to work with Britney, gave them the song and Heidi recorded her vocals into the song. The song sounds really processed. Looks like a lawsuit is coming in Heidi's way.