Cool article by Aidin Vaziri in the SF Chronicle on Sunday. He goes over the Foo Fighters favorite cover songs. I'm a huge fan of covers. Pearl Jam does Babba O'Riley and Rocking In The Free World (this version with Bono of U2) amazingly well.
My favorite video-ed covers by the Foo Fighter? Here you go.
Keep the Car Running by the Arcade Fire
Tiny Dancer by Elton John
Born on the Bayou - Credence Clear Water