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Rock vets Soundgarden will celebrate the 20th anniversary of their hit album Superunknown this year with a pair of deluxe reissues. 

Come June 3rd, fans will be treated to a remastered version of the 1994 record along with demos, B-sides, and rehearsals.  And those willing to spring for the five-disc Super Deluxe Edition will get even more bonus material, along with a Blu-ray disc featuring a five-point-one mix of the album.  It also includes a lenticular cover, never-before-seen photos, a hardbound book, and liner notes by "Rolling Stone" senior editor David Fricke. 

In the meantime, Soundgarden plan to mark this year's Record Store Day by releasing all the Superunknown singles on ten-inch vinyl.  The five-record set will be available April 19th.

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