Twenty years after its release, NIRVANA's "Nevermind" classic album will be performed live in its entirety each song played by a different Seattle group on September 20 at the Sky Church venue at the Experience Music Project. Performers include NIRVANA bassist Krist Novoselic, members of THE FASTBACKS, VAPORLAND, THE LONG WINTERS, VISQUEEN, CAMPFIRE OK, RAVENNA WOODS and VALIS.The gig is a benefit for Seattle music industry figure Susie Tennant, who was recently diagnosed with cancer. Due out on September 27, the 20th-anniversary deluxe edition of "Nevermind" will arrive as a remastered CD and digital release, a two-disc set featuring B-sides and demo recordings, and a "super deluxe" four-CD/one-DVD limited edition that will include an alternate mix of the album by producer Butch Vig. This version will also come with a 90-page book and a CD/DVD of NIRVANA's 1991 Halloween gig in Seattle. A vinyl edition of "Nevermind" will also be released, along with separate Blu-ray and DVD versions of the Halloween 1991 show. All but the standard CD will feature dozens of previously unreleased recordings, obscure B-sides, alternate mixes, radio sessions, studio rarities and live tracks. The new mix by Vig will be substantially different from the final album mix by Andy Wallace that was released commercially. The Halloween 1991 show is the only known NIRVANA concert shot on film and has been transferred to a high-definition picture with Surround Sound.