Foo Fighters & Joan Jett Rock Letterman [VIDEO]

Anything worth doing, is worth doing twice, right?

At the Foo Fighters Madison Square Garden show Sunday night, Dave Grohl and Company brought out several special guests...but, the house went bat#&*@ crazy when the Foos brought out Joan Jett to perform “Bad Reputation”.

The collaboration, because the Foos teamed up with her to do the song Wednesday night on the Late Show with David Letterman.  Check out the chaos here: