THE SECRET SISTERS HOMETOWN: Muscle Shoals, Ala. influences: The Everly Brothers, Simon and Garfunkel, Don Williams ALBUM: The Secret Sisters, out now WEBSITE: secretsistersband.com Sisters Laura and Lydia Rogers grew up singing together in a town famous for music—but they never intended to perform as a duo. An impromptu audition for veteran producer Dave Cobb in the fall of 2009 changed all that. A few days later, Cobb had them on a plane to...