Nirvana hasn't been in the music scene for more than 20 years after the tragic death of frontman Kurt Cobain, leaving fans of the iconic rock band aching for some sort of reunion — or anything, really. Just get them together somewhere and let them perform.

Foo Fighters, whose frontman Dave Grohl was Nirvana's drummer, just did that.

The Grammy-winning rock band surprised fans by holding some sort of reunion on the spot. He asked Nirvana's founding bassist Krist Novoselic onstage for a song during a Foo Fighters show held earlier this week at the Matthew Knight Arena in Oregon.

As shown in the clip, Grohl calls his former bandmate, hugs him, kisses him on the cheek, all while the crowd goes wild. Unfortunately, they didn't perform "Smells Like Teen Spirit" or "Drain You," but they did launch into "Big Me," an early Foo Fighters hit.

"Back in the day, I had this song that I thought might be kind of cool," recalled Grohl onstage. Then he discussed how he and Novoselic were at a studio once and "had nothing to do all day long." But then Grohl had been struck by an idea, which resulted into him and Novoselic recording a song together. "It wound up on the first Foo Fighters record."

With Foo Fighters guitarist Pat Smear there, who joined Nirvana as a rhythm guitarist in 1993 during its In Utero era, the surprise performance was as close to a Nirvana reunion as it's going to get. If only Cobain could come back to life.

"I love you Krist," Grohl said just Novoselic makes his exit. "Forever and ever and ever and ever."

Then Novoselic pretended that he was going to smash his instrument into bits as he made his way to the wings, at which point Grohl screamed, "No, no! That's a new one — don't smash that!

Needless to say, the performance was a rare moment even if the trio has reunited several times for other one-off performance in recent years. When Nirvana was inducted into the Rock and Roll Hall of Fame in 2014, the band performed a four-track set with Joan Jett, Lorde, Sonic Youth vocalist-bassist Kim Gordon, and St. Vincent.

Novoselic, Grohl, and Smear also partnered up with Paul McCartney during the creation of the Grohl-directed documentary Sound City, where they created a new track called "Cut Me Some Slack" and performed on several occasions in 2013.

Check out the surprise Nirvana performance below:

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