The surviving members of Nirvana reunited at the end of Foo Fighters' set at the Cal Jam festival on Saturday night (October 6th) to perform six songs. Drummer Dave Grohl, guitarist Pat Smear -- both of whom are in the Foos -- and bassist Krist Novoselic were joined on vocals by Deer Tick frontman John McAuley for the songs "Serve The Servants," "Scentless Apprentice" and "In Bloom."

Following McAuley's half of the set, Joan Jett then came out to play three more songs with the band: "Breed," "Smells Like Teen Spirit" and "All Apologies." The latter song saw Novoselic switch to the accordion while Brody Dalle of the Distillers took over on bass.

Jett previously fronted Nirvana at the band's Rock And Roll Hall Of Fame induction in 2014, while McAuley and Jett took part in a private aftershow performance. That event, which also saw Lorde, Kim Gordon and St. Vincent take the mic at various points, marked the first Nirvana performances since Kurt Cobain died in April 1994.

Foo Fighters headlined Saturday's day-long Cal Jam event, which also featured sets from Greta Van Fleet, Garbage, Iggy Pop, Billy Idol, Silversun Pickups and others. Both Deer Tick and Novoselic's current band, Giants In The Trees, were on the bill, leading to speculation that the Nirvana set would take place.