Chris Cornell Music Soars on iTunes Charts and Amazon After Death

Chris Cornell's music is spiking in sales on iTunes and Amazon.

The leap was, of course, expected after his death -- but it's interesting to see what fans are connecting with most. The 20th anniversary reissue of Soundgarden's "Superunknown" is the #1 album on iTunes -- and his other band, Audioslave, has the #2 spot.

His recordings are scattered all over Amazon's "Movers & Shakers" chart as well.

In an odd coincidence ... some rare Cornell recordings will be out Friday when a deluxe reissue of the "Singles" soundtrack is released. It will include previously unreleased songs Chris wrote for the film's score.