On Tuesday, April 21, Walt Disney Records will release a compilation album of 15 tracks featuring nominees and nominated songs for the 2015 Radio Disney Music Awards, music’s biggest event for families. The album includes hits such as “All About That Bass” by Meghan Trainor, “Problem” by Ariana Grande featuring Iggy Azalea, “The Heart Wants What It Wants” by Selena Gomez and “Really Don’t Care” by Demi Lovato. The Radio Disney Music Awards track list follows: Meghan Trainor – “All About That…