"I've been waiting years for this, Animal," Grohl says on the darkened set of Up Late with Miss Piggy, where he meets with Electric Mayhem's drummer to see who reigns supreme.

"Now we see who best," Animal disses before launching into a massive solo. Earlier in his guest spot on The Muppets, Grohl joined Miss Piggy's house band Electric Mayhem before things took a turn after the taping. Watch the drummers battle - here.

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