Old Crow Medicine Show is an Americana string band based in Nashville, Tennessee. Their music has been called old-time, bluegrass, folk, and alt-country. Along with original songs, the band performs many pre-World War II blues and folk songs. Recording since 1998, they have released four studio albums—O.C.M.S. (2004), Big Iron World (2006), Tennessee Pusher (2008), and Carry Me Back (2012). Their song "Wagon Wheel", co-authored with Bob Dylan, was certified gold by the Recording Industry Association of America in November 2011 and has been covered by a number of acts, including Darius Rucker.