Bing Crosby was, without doubt, the most popular and influential media star of the first half of the 20th century. The undisputed best-selling artist until well into the rock era (with over half a billion records in circulation), the most popular radio star of all time, and the biggest box-office draw of the 1940s, Crosby dominated the entertainment world from the Depression until the mid-'50s, and proved just as influential as he was popular.