sentences:  It includes Crosby's signature song "White Christmas", the best-selling single of all time with estimated sales of over 50 million copies worldwide.The album has sold over 15 million copies and is the second best-selling Christmas album of all-time behind "Elvis' Christmas Album", which has sold more than 19 million copies worldwide.The original 1945 release and subsequent re-releases and re-packages spent a total of 39 weeks at no.