Christmas Love Duets includes the John Lennon song that was released in what year as a single?
Christmas Love Duets:  The album features six songs with minus one including Jackson 5's "Give Love on Christmas Day," "Perfect Christmas," Judy Garland's "Have Yourself A Merry Little Christmas," "The Little Christmas Tree," Stevie Wonder's "Someday At Christmas," and John Lennon's "Happy Xmas (War Is Over)". Happy Xmas (War Is Over): "Happy Xmas (War Is Over)" is a Christmas song with lyrics by John Lennon and Yoko Ono, released in 1971 as a single by John & Yoko/Plastic Ono Band with the Harlem Community Choir.
1971