At least one thing on this cold morning in Saas-Fee feels like it was 1984, as the video here shows Last Christmas was rotated. Fresh snow has dusted the rock faces and jagged glacial escarpments that close the valley in Switzerland’s Saas Valley. Snow is also the only reason why the duo Wham! and a film crew came here 40 years ago to accompany the song with moving images that is now the most successful Christmas pop song of all time: Last Christmas.