Shawn Colvin, Mavis Staples, Mary Chapin Carpenter, Kris Kristofferson, Sara Watkins, Shovels & Rope, Steve Earle, Conor Oberst, Trampled by Turtles, Vince Gill, Martina McBride, Iron & Wine, Rodney Crowell, Sheryl Crow, Chris Coleman, Alison Krauss, Daniel Lanois, John Starling, Holly Williams, Emmylou Harris, Lucinda Williams, Buddy Miller, Herb Pedersen, Chris Hillman, Lee Ann Womack, The Milk Carton Kids, Patty Griffin