When Krist Novoselic’s band Giants in the Trees opened for the Foo Fighters at Seattle’s Safeco Field on Saturday night, September 1st, no one expected to see a mini Nirvana reunion. Dave Grohl invited Novoselic on stage during the Foo Fighters set and the duo performed Nirvana’s cover of The Vaselines’ “Molly Lips.” This is only the second time that Novoselic has joined the Foo Fighters to perform the song. They previously hooked up for a one off performance in Scotland, the home of The Vaselines, in September 2015. Fans may get treated to another reunion at Cal Jam 2018 on October 16th in San Bernardino, California. Giants in the Trees and Foo Fighters are both on the festival bill.