Well yeah, if he hacked her he would have a full studio version of the song. Not some crappy Nokia phone recording that sounds a mile away from the studio.
I don't believe it.
Bobby got onto ha ass real fast, because if it wasn't Gaga he would just prove it by posting the name of his band or a HQ version of the song.
He said on another forum that the vocals are him just pitched up, which I find hard to believe, since they're already so deep in the leak and you would definitely notice if they had been pitched up.