Bing Crosby introduced the song "White Christmas" not in the movie "White Christmas" but in this earlier film
I refer to WC as a semi-remake because its connections to the earlier movie ... 
to capitalize on the value of White Christmas as a song, but there's no reason... [DOC] [TLE] No one dreamed of a 'White Christmas' before this song | PBS ... [PAR] Dec 24, 2015 ... "White Christmas," the holiday classic penned by Irving Berlin and most famously 
... season: a new way to look at a classic song, Bing Crosby's White Christmas.