Back in 1971, John and Yoko took the bare bones of a traditional folk song called "Stewball" and transformed it into a Christmas classic. "Happy Christmas (War is Over)" is a heartfelt mix of clear-eyed Lennon honesty and starry-eyed Lennon idealism. It's also—in my hyperbolic opinion—one of the greatest Christmas songs ever written. So let's officially kick off the Creation Point Christmas Celebration with the video below. And feel free to sing along.