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 Andy Grammer Coldplay Ben Folds Five Mat Kearney Sara Bareillies Boyce Avenue Jack'S Mannequin Matchbox 20 Ben Howard Joe Brooks Of Monsters And Men Barenaked Ladies Goo Goo Dolls Ben Rector Pete Yorn Alana Davis Tristan Prettyman Jamiroquai B.O.B Maroon5 Dashboard Confessional Matt Wertz Death Cab For Cutie David Gray The Cab Riptide Iron And Wine Lenka Switchfoot Ron Pope