Bruce Springsteen has shared his unreleased song "Blind Spot," the "thematic center" of his Streets of Philadelphia Sessions, one of the seven LPs that have been unearthed for the upcoming Tracks II: The Lost Albums.

The song from the "Streets of Philadelphia Sessions" was inspired by the Boss' fascination with West Coast hip-hop.

As if 21 albums weren’t enough. Nearly 100 singles. More than 100 live discs. Ten box sets. As if all that weren’t enough, Bruce Springsteen will unleash an avalanche of “new” music this summer. Tracks II: The Lost Albums isn’t new.