Dave Grohl performed solo at the 'Notes + Words' benefit concert Saturday night (May 12) before bringing up two very special guests: his daughters Violet and Harper. The former delivered a stunning rendition of Adele's "When We Were Young" (above) and when joined by Harper, the trio covered the Foo Fighters' hit "The Sky Is a Neighborhood" (below) from the band's most recent album, Concrete and Gold.

The concert was a benefit for UCSF Benioff Children's Hospital in Oakland, Calif. and was held at the city's Fox Theater. Grohl performed acoustic renditions of the Foo Fighters songs "Everlong," "Learn to Fly," "Times Like These," Cold Day In the Sun," "Best of You" and "My Hero" before bringing 12-year-old, Violet, onstage.

Before performing the song, Grohl and Violet said that they last played the Adele hit from the 2015 album 25 at her fourth-grade talent show. When nine-year-old Harper came out, she sat behind the drum kit to provide backing vocals on "The Sky Is a Neighborhood" along with Violet. The two also appeared in the official Foo Fighters video for the track, which was released in August of last year. To close out the performance, Harper played drums on a cover of the Queen song "We Will Rock You," much like she did at the Foo's concert in Iceland last spring.

Earlier this month, Foo Fighters wrapped up the most recent leg of their tour in support of Concrete and Gold. They'll be heading out again for another North American run in July and again in October. The full list of dates can be found here.

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