What is your favorite cover?

There are many great covers, such as Mr. Tambourine Man,by the Byrds.  I'm curious about everyone's favorite.


Plenty of great covers of Leonard Cohen songs.  Among my favorite:

Concrete Blonde: "Everybody Knows"

Jeff Buckley: "Hallelujah"

R.E.M.: "First We Take Manhattan"

Here's another nice one. A live cover of Joni Mitchell's - "River" by Indigo Girls...