Watch Hayley Williams Join Foo Fighters For 'My Hero' Performance

MANCHESTER, TENNESSEE – JUNE 18: (L – R) Rami Jaffee, Dave Grohl and Josh Freese of Foo Fighters perform in concert during Bonnaroo Music & Arts Festival on June 18, 2023 in Manchester, Tennessee. (Photo by Gary Miller/WireImage)

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!”