Amos Lee Ray Lamontagne Brett Dennen Joe Purdy Joshua Radin Tyrone Wells Jon Foreman Ingrid Michaelson The Weepies Susie Suh Norah Jones Lisa Bassenge William Fitzsimmons Liane Foly Niels Frevert Corinne Bailey Rae Ryan Adams Jack Johnson Tedeschi Trucks Band Justin Nozuka Ben Harper Griffin House Joshua James Grace Potter And The Nocturnals Sean Hayes Corinne Baily Rae Craig Cardiff Faine Jade Foy Vance The Gabe Dixon Band Ultimate Spinach Iron And Wine The Steel Drivers Andrew Duhon Ray La Montagne The Lumineers Teddy Geiger Jamestown Revival Madeleine Peyroux Needtobreathe Donovan Woods Carey Ott Matt Nathanson Ryan Montbleau Martin Sexton Jamie Cullum Tommy Emmanuel Van Morisson Drew Holcomb And The Neighbors