What are your favourite cover songs?

L7 covering American Society by Eddie and the Subtitles

L7
http://www.youtube.com/watch?feature=player_detailpage&v=9TvO623-fNg#t=0s

Eddie and the Subtitles
http://www.youtube.com/watch?feature=player_detailpage&v=wVlNqsqN1IE#t=0s