White Christmas (weather) by Bing Crosby from the film "Holiday Inn", is the best-selling single of all time and speaks nostalgically of a traditional white Christmas. The definition of "white Christmas" varies. In most countries, it simply means that the ground is covered by snow at Christmas, but some countries have more strict definitions. In the United States, the official definition of a white Christmas is that there has to be a snow depth of at least at 7:00 a.m. local time on Christmas morning, and in Canada the official definition is that there has to be more than on the ground on
White Christmas (film) song was sung by Rosemary Clooney and her own sister, Betty. Berlin wrote "A Singer, A Dancer" for Crosby and his planned co-star Fred Astaire but when he was unavailable, Berlin re-wrote it as "A Crooner – A Comic" for Crosby and Donald O'Connor, but when O'Connor left the project so did the song. Another song written by Berlin for the film was "Sittin' in the Sun (Countin' My Money)" but because of delays in production Berlin decided to publish it independently. Crosby and Kaye also recorded another Berlin song ("Santa Claus") for the opening WWII Christmas Eve show scene,