Darius Rucker has earned his first double-platinum single as a country artist with "Wagon Wheel." The RIAA certification marks a combination of sales and streaming representing 2 million units. The track comes from his True Believers album, released in May. Rucker earned his first platinum single in 2011 with "Alright." His upcoming tour dates include Davenport, Iowa, on Friday (July 19), as well as West Bend, Wis., on July 26 and Bowling Green, Ky., on July 27.