A previously unheard Postal Service track titled "A Tattered Line of String" emerged on Monday (Feb. 11), marking the first "new" music from the group in nearly a decade's time. The slick, upbeat electro-pop song is one of two unreleased tracks set to make its debut on the 10-year anniversary reissue of the Postal Service's lone album, "Give Up."

"A Tattered Line of String" features Jenny Lewis -- of Rilo Kiley, Jenny and Johnny, and solo fame -- on backing vocals; Lewis appeared as a guest on many of the album's original cuts, and will also be present on the reissue's other "new" track, "Turn Around." Due Apr. 9 on Sub Pop, the "Give Up" reissue will feature a second disc containing (in addition to the two new songs) a collection of remixes, live cuts, covers, and more.

The Postal Service members Ben Gibbard and Jimmy Tamborello will be embarking on a long-anticipated reunion tour [1], which begins Apr. 9 and includes a stop at Coachella 2013. Lewis will also be along for the ride on the group's first tour since 2003.