Check out all of Postmodern Jukebox’s stuff. Here’s a fantastic cover of GnR’s “Sweet Child O’ Mine”:
http://www.youtube.com/watch?v=kJ3BAF_15yQ
Don’t forget about another G&R parody.
Welcome To The Jungle
(lounge version)
by Richard Cheese
https://www.youtube.com/watch?v=Mr7EBuz-2xI