The hit "Do They Know It's Christmas" was written to raise money for the famine in Ethiopia for Band Aid 1984. Featuring mostly Irish and British popular singers of the time, the record shot straight to #1, preventing the perennial Christmas favorite "Last Christmas" from ever reaching the top of the charts.
I regret not recognizing more of the singers, although I picked out George Michael, Boy George, Sting, Bono, some dude from Duran Duran, Phil Collins, and lots of hair. Here's a full list of who's in it.
Favorite moment: the cut to Sting as the word "sting" is sung at 1:19. Classic.