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 .