"Happy Xmas (War Is Over)
" by John & Yoko/Plastic Ono Band with the Harlem Community Choir
(that is the correct title and artist designation according to Wikipedia
I have also come to enjoy Slade's "Merry Xmas Everybody,"
which is played interminably, everywhere in Britain at this season. It used to annoy me, but I have now heard it so often that I have moved beyond irritation to appreciation.