The surviving Nirvana members, Krist Novoselic, Dave Grohl and Pat Smear reunited this weekend at Cal Jam for a surprise 6-song performance. It was rumored earlier this week that the reunion would be happening. And now there’s proof.

The three surviving members were accompanied by Deer Tick singer John McCauley who sang “Serve the Servants”, “Scentless Apprentice”, and “In Bloom” and Joan Jett who sang “Breed”, “Smells Like Teen Spirit”, and “All Apologies.”

Check out the fan footage below.