Merry Xmas Everybody

"Merry Xmas Everybody" was a popular Christmas song on the planet Earth. The song was playing on Mickey Smith's garage's radio when the newly-regenerated Doctor crash-landed on the Powell Estate on Christmas Eve 2006. (DW: The Christmas Invasion)  In 2007, the song was playing at Donna Noble's first wedding reception. (DW: The Runaway Bride) It also was heard on the radio in an alternate version of Christmas 2007. (DW: Turn Left)
 * ''In the real world, it was popularized in the United Kingdom by the rock band Slade in 1973.