Pitch Perfect Pentatonix A Great Big World Phil Phillips Adele Adkins Adam Levine Straight No Chaser Gabrielle Alpin American Mouth The Walkervilles Lucy Spraggan Home Free The Barden Bellas The Treblemakers Farewell Drifters Lp Walk Off The Earth Imagine Dragons Bastille Ingrid Michaelson Katy Perry Maroon 5 Mike Tompkins P!Nk Hunter Valentine The Warblers Steve Grand Todrick Hall Eli Lieb Elevation Worship My Fair Fiend Filharmonic Panic! At The Disco Street Corner Symphony Macklemore And Ryan Lewis Mans Zelmerlow Lmafo Chrissy Costanza The Wise Guys Olly Murs Florence And The Machine The Head And The Heart Emeli Sande The Inversions The Dapper Dans Jonas Winterland Reid Stefan Tabata Obc