What are your favourite cover songs?

[ame="http://www.youtube.com/watch?v=fcXoRlvpLVY"]Nirvana - D-7 - YouTube[/ame]

A cover of this.

[ame="http://www.youtube.com/watch?v=MRa5BWOOGZM"]The Wipers - D-7 - YouTube[/ame]