What is the best-selling single worldwide?
According to Guinness World Records, Irving Berlin's "White Christmas" (1942) as performed by Bing Crosby is the best-selling single worldwide, with estimated sales of over 50 million copies. The song, recognized as "the best-selling single of all time", was released before the pop/rock singles-chart era and "was listed as the world's best-selling single in the first-ever Guinness Book of Records (published in 1955) and—remarkably—still retains the title more than 50 years later".
The best-selling single worldwide, according to Guinness World Records, is Irving Berlin's "White Christmas", which was performed by Bing Crosby in 1942 with over 50 million copies sold.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What is the best-selling single worldwide?
### Input: According to Guinness World Records, Irving Berlin's "White Christmas" (1942) as performed by Bing Crosby is the best-selling single worldwide, with estimated sales of over 50 million copies. The song, recognized as "the best-selling single of all time", was released before the pop/rock singles-chart era and "was listed as the world's best-selling single in the first-ever Guinness Book of Records (published in 1955) and—remarkably—still retains the title more than 50 years later".
### Response: The best-selling single worldwide, according to Guinness World Records, is Irving Berlin's "White Christmas", which was performed by Bing Crosby in 1942 with over 50 million copies sold.