Exactly what I was thinking.
EDIT: Wow, I just found a HUGE torrent of Hard Rock/Metal covers. And I mean, like, Sinner covering Rebel Yell, Angra covering Kashmir, Blind Guardian's Mr Sandman cover, Dungeon covering Blondie's Call Me. All of those are on the first CD(? it's an unofficial digital release), and over 150 releases in total! It's absolutely mind-blowing, and it's such an awesome collection. There are covers of everything from Uriah Heap, to Abba, to Bowie, and even a cover of Thriller in there somewhere.