Joan Jett and Violet Grohl also joined Dave Grohl, Krist Novoselic, and Pat Smear for a handful of Nirvana classics

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.

St. Vincent, Joan Jett and Kim Gordon joined Pat Smear and original Nirvana members Dave Grohl and Krist Novoselic onstage for a reunion of sorts at FireAid Thursday. Violet, Jett, and Gordon each subbed in for the late Kurt Cobain.

FireAid had some surprises in store, but none bigger than the first reunion from Nirvana's surviving members in over a decade.

Fans in the Intuit Dome wondering what hit them may have belatedly realized they were witnessing the closest thing to a Nirvana reunion we'll get: The band's three surviving members - Krist Novoselic,

The band also brought out Dave Grohl's 18-year-old daughter, Violet Grohl, to wrap up the set with an emotional rendition of "All Apologies"

Dave Grohl's daughter Violet sang with his fellow Nirvana band members on Thursday, Jan. 30 at the FireAid Benefit Concert for California Fire Relief