Being one who loves a good cover song, was excited to find these gems on YouTube:

Guerilla Radio – Alanis Morissette gives her take on this Rage Against the Machine banger
My Humps – Another Alanis classic for this Black Eyed Peas Top 40 hit
Hey Ya – Supersuckers amp up Outkast – shake it like a Polaroid picture
Breakin the Law – Supersuckers do some Priest, country style
Sweet Child o’ Mine – Carrie Underwood (American Idol?)
Sweet Child o’ Mine – Kelly Clarkson – what is it with these American Idol chicks and Gn’R?
Turn the Page – Metallica channels Bob Seger
Darling Nikki – Foo Fighters rip this Prince oldie [Foo Fighters do so many great covers that the local SF paper opined a Top 10 list]