Last night, the Foo Fighters took to the stage on Letterman with special guest Joan Jett for a rendition of her classic “Bad Reputation.” The energetic performance sounded like a return to the early days of the Foo Fighters (even though they were performing a cover), with rough, garage sounds and Dave Grohl‘s frantic, rebellious head banging. The presence of Jett spoke for itself — the rock veteran completely stole the show with her gravelly vocals, rock style and oozing attitude. It was a pretty epic moment, and now we’re wondering if maybe jealousy had something to do with Courtney Love’s public outburst against Grohl over the weekend…

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