"Merry Xmas Everybody" was a popular Christmas song, released by Slade in 1973. Six years later, the song was still incredibly popular in Britain, playing on the radio. Clive Finch was completely sick of it, and hoped it would finally be forgotten about by the following year. According to Clive, or CJ, it contained a long, loud cry of, "IT'S CHRIIISTMAAS". (PROSE: The Persistence of Memory)

The song was playing on the radio in the garage where Mickey Smith was working when the newly-regenerated Tenth Doctor crash-landed his TARDIS on the Powell Estate on 24 December 2006. (TV: The Christmas Invasion)

On 25 December 2007, the song was playing at Donna Noble's first wedding reception. (TV: The Runaway Bride) It also was heard on the radio in an alternate version of Christmas 2007. (TV: Turn Left)

In 2009, Sylvia Noble opened up a Christmas card that played the song. (TV: The End of Time)

In 2017, the song was played in the Black Swan pub in Cheldon Bonniface. (PROSE: Not in My Back Yard)

The song was also played at the hospital where Rory Williams worked. (TV: The Power of Three)

In a shared dream, this song was played into Shona McCullough's ears to keep Shona distracted from thinking about the dream crabs. She danced and sang along to the song while listening to it. (TV: Last Christmas)

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