It's something that has occured the odd time over the years, but when it does happen it's always memorable.
The surviving members of Nirvana reunited the other night at a Foo Fighters concert in Eugene, Oregon.
Of course, it'd be more accurate to say that Nirvana bassist Krist Novoselic joined his former bandmates Dave Grohl and Pat Smear for a song, the latter two being Foo Fighters members - but nevertheless, they jammed on early Foos song 'Big Me'.
Now, if they'd played a Nirvana tune, that really would have been something special - but maybe that's for another day.
Watch it below:
