Does anybody know?

Well... Not really. There is no official album called Disco Heaven, though bạn can find downloads for it if bạn tìm kiếm on Google. It's a collection (probably fanmade) of unreleased songs and bonus tracks from The Fame, that were only released in some countries.
So in short... no, Disco Heaven is not a real album. :)

It is not an album they just made a cover and cald it an album.it is made bởi a fan.There is no songs at all.