Country singer-songwriter Sturgill Simpson stays true to his Appalachian roots with his no-frills singing style and boot-stomping live shows. His rocking sound pays homage to country outlaws like Johnny Cash and Waylon Jennings, but never feels like imitation -- Simpson's cerebral lyrics and psychedelic production touches keep the music firmly grounded in the present. Whether he's extolling the virtues of a "Life of Sin" or playing his unique cover of When In Rome's "The Promise", Simpson always impresses with his authentic vocals, smart songwriting, and unbeatable energy on tour.