"White Christmas" is written by Irving Berlin. The morning after he wrote the song — Berlin usually stayed up all night writing — the songwriter went to his office and told his musical secretary, "Grab your pen and take down this song. I just wrote the best song I've ever written — hell, I just wrote the best song that anybody's ever written!"
"White Christmas" was introduced by Bing Cro*****y in the 1942 musical Holiday Inn. In the film, he actually sings it in a duet with Marjorie Reynolds. The song went on to receive the Academy Award for Best Song.