5 O'Clock Shadowboxers is the hip-hop duo in the tradition of duos such as Gangstarr, where one artist is the vocalist and the other supplies the instrumental tracks. In this case, the vocalist is Zilla Rocca of the Philadelphia-based hip-hop group Clean Guns (as well as the President of Beat Garden Entertainment) and the producer is Seattle resident Douglas Martin (the brains behind Fresh Cherries from Yakima, the experimental folk-pop singer/songwriter project and music blog). Read more on Last.fm