Nirvana's 1991 album Nevermind – the epoch-defining record that Rolling Stone has declared the Number One album of the Nineties and the 17th greatest album of all time – will be reissued on September 20th as a deluxe 5-disc edition. The expanded set celebrates the 20th anniversary of the record's original release with an extensive collection of previously unheard recordings, rarities, b-sides, radio sessions, live performances and an unreleased concert presented in its entirety on DVD.

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As of yet, Universal has not released a full track listing for the deluxe edition. As it turns out, even band member Dave Grohl isn't quite sure what will turn up in the set. "I mean, as far as content and releases and stuff like that, honestly, it’s like I’m the drummer again. I’m the last one to know anything," Grohl told Rolling Stone. "It’s almost like a wedding anniversary – something that someone reminds you of about a week beforehand, and then you panic and buy flowers."

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Even still, Grohl hints at other Nevermind anniversary surprises down the line. "I wouldn’t doubt it if something very special happens – we have a few things up our sleeves. I can’t really say anything yet. But you’ll see. It’ll be fun."

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