Wham!'s 'Last Christmas' is the most depressing original Christmas song I can think of, lol, but the one no holiday season is complete without. For me, it doesn't feel like Christmas UNTIL I hear this song. Released in 1984, not long before the duo of George Michael and Andrew Ridgeley called it quits, it became the biggest selling UK single to never reach #1 on the charts, and served as the B-side to the smash hit 'Everything She Wants'.