Watch Hayley Williams Join Foo Fighters For ‘My Hero’ Performance

Video of Paramore’s Hayley Williams joining the Foo Fighters at Bonnaroo is circulating.

Williams, who had played that same stage just before Foo Fighters’ set, came back out to join the headliners last night for an unforgettable performance of “My Hero.”

Frontman Dave Grohl seemed excited to have her and remarked, mid-song, “Aw she’s harmonizing!”

What’s the best live duet you have ever seen?

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