An absolute highlight of FireAid was the comet-like reappearance of the remaining members of Nirvana onstage together playing the band's songs again.

Joan Jett, Kim Gordon and St. Vincent also joined Dave Grohl, Krist Novoselic and Pat Smear onstage at the charity fundraiser in Los Angeles

Then came what was perhaps the biggest surprise: Violet Grohl, Dave’s 18-year-old daughter, singing lead vocals on Nirvana’s In Utero highlight “All Apologies.” Her vocals were strong and well-suited for the song, and while the magnitude of the Kia Forum’s crowd wasn’t lost on her, she was remarkably comfortable in front of the massive crowd.

From surprise guests to touching moments of humility, here were the most memorable moments from the Jan. 30 FireAid benefit concerts in Los Angeles.

Dave Grohl and Nirvana stunned fans on Thursday as they performed surprise songs at the FireAid concert in LA, before Dave's teen daughter joined him on stage

The surviving members of Nirvana reunited at FireAid, rocking through four of the grunge giant’s classic tracks. The unannounced performance marked Dave Grohl ’s return to the stage following public acknowledgement in September that he fathered a child out of wedlock.

Dave Grohl, Krist Novoselic and Pat Smear reunited and were helped by variety of guest vocalists for a Nirvana performance at the FireAid benefit concert.

FireAid, a sprawling benefit concert for wildfire relief, featured Joni Mitchell, Stevie Wonder, Billie Eilish, Lady Gaga, members of Nirvana and dozens more.

At FireAid, the surviving members of Nirvana recruited St, Vincent, Kim Gordon, Joan Jett, and more to fill Kurt Cobain's shoes.

A trio of singers filled in for Kurt Cobain as Dave Grohl, Pat Smear and Krist Novoselic performed "Breed," "School" and "Territorial Pissings.”

Billie Eilish, Dr. Dre, Stevie Wonder, Green Day, Joni Mitchell, No Doubt and the remaining members of Nirvana all performed.