Today is Andy Refheldt day here at the Mashpit. He did the Reggae version of Teen Spirit a few days back. First is an "actual" mashup, followed by a couple of what would be better called remix's or even covers. Whatever. I think they are great and I hope you do too!
Enter Love Machine
http://www.youtube.com/watch?v=EsghgJsx394 - Metallica "Enter Sandman" vs The Miracles "Love Machine"
Crazy Train (Smooth Jazz Version)
http://www.youtube.com/watch?v=OMxAq0Ofupw - Ozzy Osbourne "Crazy Train" vs Andy Refheldt
Halo (Metal Version)
http://www.youtube.com/watch?v=XQJX22a_oUY - Beyonce "Halo" vs Andy Refheldt