1. "White Christmas" was used in April of 1975 on the radio as a secret coded message during the Vietname War as a signal to American troops that the city of Saigon had been captured.
2. This song about the nativity was originally written as a plea for peace during the Cuban Missle Crisis.
3.Hugh Martin, the author of the song, was asked twice to make the lyrics to this rather depressive carol a bit more cheerful. First, he replaced the line "It may be your last / Next year we may all be living in the past" to "Let your heart be light / Next year all our troubles will be out of sight" for Judy Garland. Then he changed the lyric "Until then we'll have to muddle through somehow" to "Hang a shining star upon the highest bough" because Frank Sinatra told him the lyrics weren't jolly enough for his album, A Jolly Christmas.
4. The singing voice of the Grinch, Thurl Ravenscroft was also the voice of the Frosted Flakes cereal mascot, Tony the Tiger, for almost 50 years.
5. The original title of this holiday stardard was "Tinkle Bells" until one of the writers, Ray Evans, showed the title to his wife and she asked, "Are you out of your mind? Do you know what the word tinkle is?"
6. This is Mariah's biggest hit ever in Japan, and she always performs it in concert there despite never visiting the nation during the holiday season.