My Little Pony: Equestria Girls – Rainbow Rocks (2014)

As a now reform Sunset Shimmer struggles to make friends with the other students of Canterlot High, a trio of new villains called The Sirens (Adagio, Sonata, and Aria) come and use their magic of music to take control of everyone to make a Battle of the Bands. With help of Twilight Sparkle, the Student Six will do what it takes to beat the Sirens.