Elton John‘s smash 1973 album Goodbye Yellow Brick Road, considered by many to be the peak of his career, featured plenty of well-known tunes. “Harmony,” the humble B-side of the hit “Bennie and the Jets,” utilized Elton’s unique wall-of-sound multi-layered background vocals. It modulates back and forth between Eb minor and Eb major. Starting in minor, it modulates to major just before the first chorus (0:33), then back into minor for the next verse at 1:09, and then back to major at 1:31 through the short balance of this distinctive tune.