Bing Crosby introduced the song "White Christmas" not in the movie "White Christmas" but in this earlier film
In the... [DOC] [TLE] White Christmas (film) - Wikipedia [PAR] White Christmas is a 1954 American musical romantic comedy film directed by 
Michael Curtiz and starring Bing Crosby, ... a new version of the title song, "White 
Christmas", introduced by Crosby in the film Holiday Inn.