According to Guinness World Records, the 1942 version of the song White Christmas by Bing Crosby is the best-selling single worldwide, with estimated sales of over 50 million copies. There has been debate on whether it really is the best-selling single in the world because Crosby's recording was released before the advent of the modern-day singles charts.
White Christmas was originally written by Irving Berlin and in it he reminisces about an old-fashioned Christmas setting. The first public performance was sung by Bing Crosby, on the NBC radio show The Kraft Music Hall on Christmas Day in 1941. It is also the most-recorded Christmas song, with more than 500 recorded versions.
We heard that Bing Crosby was unenthusiastic and only mildly impressed when the song White Christmas was first brought to him!