Happy Christmas War Is Over is a Christmas song written by John Lennon, the legendary singer and songwriter of the Beatles. It was released in 1971 as a single, with Yoko Ono singing the female parts. The song is a heartfelt message of peace and love, expressing the hope that the world can come together and put an end to war and conflict. The song became a worldwide hit and is considered a Christmas classic, with its lyrics and melody capturing the essence of the holiday season.