The 'Nevermind' deluxe box sets have been released, remastered with rarities, b-sides, and bootlegs.  Just when you thought you've heard everything Nirvana ever recorded, 'Nevermind' producer Butch Vig revealed that yes there is one more song called 'Song In D'.

Nirvana fans are probably flippin' right now. After all the Nirvana compilation albums and box sets that have been released, only live and demo versions have been added to their catalog.

According the the Grunge Report.  Butch Vig said there’s an unfinished song called “Song in D” from the “Nevermind” recording sessions that has no lyrics.  Jon Stewart hosted a town hall type Q &A interview to celebrate the 20th anniversary of Nevermind with Krist Novoselic, Dave Grohl, and Butch Vig.   Dave Grohl even joked “Sounds like another box set!”

On another note, is airing today for 24 hours an exclusive commercial free airing a 1991 Nirvana concert Live at Paramount.