The Foo Fighters frontman is joined by the bassist on a track on his current group's new album and admits he found recording together again for the first time in over a decade bizarre, particularly as the studio session was overseen by Butch Vig, who produced Nirvana's defining 'Nevermind' LP.
Dave said: "To be in the same room as Krist and Butch for the first time in so long was a little weird. But it was cool that we survived. As he was leaving here I said in a cute voice, 'I love you, Krist', and he said in a similar voice, 'I love you, too!' "
It is not known is Krist played either bass or accordion on the track, which is expected to be included on Foo Fighters' forthcoming seventh album.
Nirvana - whose frontman Kurt Cobain committed suicide in 1994 - were propelled to huge worldwide success with their 1991 single 'Smells Like Teen Spirit', from 'Nevermind', and found themselves playing to huge crowds overnight, although when Dave seems today's bands in a similar position, he worries for their survival.
He said: "I see new bands that pop up and sell a bazillion records and playing arenas overnight, and I think 'Oh my god, that's just gonna destroy your band. And then I remember that's what happened to me, when I was a kid. But that's what f***s people up."