"Happy Xmas (War Is Over)" is a Christmas song by John Lennon, Yoko Ono and the Plastic Ono Band. It was recorded at Record Plant Studios in New York City in late October 1971, with the help of producer Phil Spector. It features heavily echoed vocals, and a sing-along chorus. The children singing in the background were from the Harlem Community Choir and are credited on the song's single. The lyrics were written by Lennon and Ono, while the melody and chord structure were taken from the folk standard known as "Stewball".