Jason Mraz John Mayer Jack Johnson Ben Harper Dave Matthews O.A.R. Matt Nathanson Counting Crows Dispatch Howie Day Bruno Mars Guster Jimmy Buffett G Love And Special Sauce Ari Hest Eric Hutchinson Train The Script Damien Rice Coldplay Andy Grammer Ben Folds Five Mat Kearney Boyce Avenue Jack'S Mannequin Sara Bareillies Matchbox 20 Ben Howard Joe Brooks Of Monsters And Men Barenaked Ladies Goo Goo Dolls Pete Yorn Alana Davis Ben Rector Tristan Prettyman B.O.B Jamiroquai Maroon5 Matt Wertz Death Cab For Cutie Dashboard Confessional David Gray The Cab Iron And Wine Switchfoot Ron Pope Lenka Pentatonix