2020 release. Nashville Songbook is a collection of tunes that define this era-some of the most influential and iconic country and pop standards ever written. Barnett salutes this great anthology, performing songs originally recorded by artists as diverse as Roy Orbison, Patsy Cline, Elvis, Tammy Wynette, Hank Williams, The Everly Brothers, Brenda Lee, Johnny Cash, and more-including Meghan Trainor.