The term 'Sing Like Crosby' refers to the style of singing popularized by the legendary crooner Bing Crosby. Crooning is a type of vocal performance characterized by a smooth, intimate, and melodic delivery. It was popularized in the 1930s and 1940s by singers such as Bing Crosby, Frank Sinatra, and Nat King Cole. The term 'CROON' is derived from the Old English word 'CRONE, ' which means 'to hum or murmur.' Crooning is still popular today, with modern artists such as Michael Buble and Harry Connick Jr. continuing to use the style.