Dave Grohl was joined by Krist Novoselic and Pat Smear for a six-song Nirvana reunion on Saturday night at CalJam!
Two guest singers were also onstage with the band for the performance. First up was John McCauley of Deer Tick for "Serve the Servant," "Scentless Apprentice" and "In Bloom." Then Joan Jett took over on lead vocals for "Breed," "Smells Like Teen Spirit" and "All Apologies." Check out the videos below!