Another week, another development in the ongoing faux feud between Dave Grohl and 10-year-old drumming phenom Nandi Bushell. On Monday, the Foo Fighters frontman and former Nirvana drummer unveiled a “theme song” for the musical “superhero” who’s become a YouTube sensation.

The saga between the little girl and the world famous musician stretches back to August 17th when Bushell posted a video on her YouTube page of her drumming to the Foo Fighters hit “Everlong” and challenged Grohl to a drum-off. Grohl responded in kind by performing the song, as well as issuing a new challenge for Bushell to play “Dead End Friends” by Them Crooked Vultures. Then last week, Bushell responded with a beat-for-beat recreation of Grohl’s performance, after which the 51-year-old musician declared her the victor of round one.

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On Monday morning, via the Foo Fighters Twitter account, Grohl officially began round two by debuting Bushell’s new “theme song.” With help from the Grohlettes, a.k.a. his daughters, Dave pounded out the rhythm to the anthem for the world’s newest super hero. Unlike anything out of the Marvel cinematic universe, Bushell’s origin story is simple and her superpowers include humiliating a grown man in front of millions of people by besting him on songs that he wrote. “She got the power/ She got the soul/ Gonna save the world with her rock & roll!” Grohl declares.

Watch the new theme song for superhero Nandi Bushell, written and performed by Dave Grohl alongside the Grohlettes.