Earlier this month, Dave Grohl got himself involved in a drum battle with 10-year-old musician Nandi Bushell, who has gone viral a few times this year because of her intense drum covers. She’s picked up Rage Against The Machine’s Tom Morello as a fan — he gifted a guitar to her over the summer — and the young musician has also attracted Grohl’s attention. For their drum battle a few weeks ago, they faced off and covered Them Crooked Vultures’ “Dead End Friends,” and Grohl gave Bushell the win.

Earlier today, he kicked off round two by writing a song for Bushell. “Number one supergirl/ Best drummer in the world/ Always right on time,” Grohl sings on the track. “Hero wunderkind/ She got the power/ She got the sound/ Nandi on the drums make the world go round.” In a tweet from the Foo Fighters account, he wrote: “Every superhero needs a theme song. Here’s one for you!”

Bushell seems excited! And says she’ll cover the song herself soon enough. Watch below.

And here’s their first face-off: