The Lettermen are an American pop music vocal group. The Lettermen's trademark is close-harmony pop songs with light arrangements. They were popular mainly with adult audiences during the 1960s. The group was formed in late 1950s by Mike Barnett, Dick Stewart and Tony Butala. They auditioned for Jackie Barnett, chief comedy writer for the Jimmy Durante TV show. They landed the part to impersonate The Rhythm Boys, the vocal group that traveled with Paul Whiteman and his orchestra in the late 1920s, and gave Bing Crosby his initial fame.