Taylor Swift Colbie Caillat Carrie Underwood Ariana Grande Selena Gomez Blake Shelton Justin Bieber Lady Gaga Avril Lavigne Sara Evans Reba Mcentire Maroon 5 Trace Adkins Carly Rae Jepsen Fifth Harmony Little Mix Lady Antebellum The Band Perry Darius Rucker Camila Cabello Miranda Lambert Charlie Puth The Fray Zac Brown Band Luke Bryan Panic! At The Disco Hailee Steinfeld Hannah Montana Martina Mcbride Hunter Hayes Sam Hunt Aly And Aj Kacey Musgraves Carly Rae Jepson Selena Gomez And The Scene Sugarland Florida Georgia Line Pop Music Phil Vassar Jess Glynne Ashley Tisdale Bebe Rexha Disney Bridgit Mendler Bea Miller The Wanted Jason Derulo Andy Grammer Glee Cast