On December 6, The Roots will release their first ever concept record entitled "Undun." This will be the Philadelphia band's 13th album. The album's concept tells the tale of the short life of a Redford Stephens (1974-1999), who became a victim of the drug trade. There are several guests on the album, but the most interesting guest is Sufjan Stevens. Sufjan appears on the instrumental track "Redford." Take a listen to the entire album before it is released on December 6 via NPR.