White Christmas is an Irving Berlin song reminiscing about an old-fashioned Christmas setting, released in 1942. The version sung by Bing Crosby is the world's best-selling single with estimated sales in excess of 50 million copies worldwide. When the figures for other versions of the song are added to Crosby's, sales of the song exceed 100 million. Accounts vary as to when and where Berlin wrote the song. One story is that he wrote it in 1940, in warm La Quinta, California, while staying at the La Quinta Hotel, a frequent Hollywood retreat also favored by writer-director-producer Frank Capra, although the Arizona Biltmore also claims the song was written there. He often stayed up all night writing. One day he told his secretary, "I want you to take down a song I wrote over the weekend. Not only is it the best song I ever wrote, it's the best song anybody ever wrote".