Santa Claus Is Comin' to Town is a Christmas song written in 1934 by J. Fred Coots and Haven Gillespie, and it has since become one of the most covered holiday standards. Its catchy warning that Santa is watching and making his list has kept it in Christmas films, television specials and seasonal playlists for decades. Online, short snippets of the tune are reused every December in videos, streams and memes because the melody is recognised instantly, even without lyrics, and it signals the festive season in just a few seconds.