In case you weren't one of the nine million people who purchased it the first time around, UMG is celebrating the 10th anniversary of the 'O Brother, Where Art Thou?' soundtrack by reissuing it with a second disc, packed with unreleased tracks.

The Deluxe Edition reissue, due August 16, adds a 17-track bonus disc to the original soundtrack - including 13 songs that were recorded during the original sessions but were, for various reasons, left off the original release, including performances from Van Dyke Parks, T Bone Burnett, Norman Blake, and the Cox Family.

Burnett, who curated and produced the original soundtrack, supervised the expansion, digging into the vaults for the added performances and adding a stamp of authority to the reissue.

See the full track listing for the bulked-up 'O Brother, Where Art Thou?' at Taste of Country.