Punch Brothers Chris Thile Nickel Creek Alison Krauss Yo-Yo Ma, Stuart Duncan, Edgar Meyer & Chris Thile Edgar Meyer Noam Pikelny Aoife O'Donovan Gillian Welch I'M With Her Sara Watkins Jerry Garcia Bela Fleck And The Flecktones The Lil Smokies Bela Fleck Nashville Symphony Lucinda Williams Mipso The Lone Bellow Goat Rodeo Sessions Willie Watson Spirit Family Reunion The Lighthouse And The Whaler Dave Rawlings Machine Cadillac Sky Marty O'Reilly & The Old Soul Orchestra Maria Mckee Pokey Lafarge And The South City Three Langhorne Slim And The Law Rob Stenson Trample By Turtles Regina Spektor The Steel Drivers Swear And Shake Relient K Ben Caplan Elaine Nolan Shovels And Rope Alison Krauss And Union Statio Chadwick Stokes Bradford Loomis David Wax Museum Jay Ungar Beatles Reimagined J.J. Grey And Mofro Mike Gordon Tony Rice Unit Iron And Wine Noah Gundersen