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

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

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,

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

Violet Grohl joined her father, Dave Grohl, and his former Nirvana members for a performance of ‘All Apologies’ at the FireAid benefit concert

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 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 five-hour, two-venue fundraising event also featured performances from the likes of Katy Perry, Billie Eilish and Stevie Wonder.

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.