White Christmas (weather) by Bing Crosby from the film "Holiday Inn", is the best-selling single of all time and speaks nostalgically of a traditional white Christmas. The definition of "white Christmas" varies. In most countries, it simply means that the ground is covered by snow at Christmas, but some countries have more strict definitions. In the United States, the official definition of a white Christmas is that there has to be a snow depth of at least at 7:00 a.m. local time on Christmas morning, and in Canada the official definition is that there has to be more than on the ground on
White Christmas (song) single, due to a lack of information on sales of "White Christmas," because Crosby's recording was released before the advent of the modern-day US and UK singles charts. However, after careful research, "Guinness World Records" in 2007 concluded that, worldwide, Crosby's recording of "White Christmas" has, in their estimation, sold at least 50 million copies, and that Elton John's recording of "Candle in the Wind 1997" has sold 33 million, making Crosby's recording the best-selling single of all time. However, an update in the 2009 edition of the book decided to further help settle the controversy amicably by naming both