show tune by Irving Berlin from the musical Betsy. Richard Rodgers and Lorenz Hart had originally written a solo number for Belle Baker, titled "This Funny World", but the star was unsatisfied with the song and asked Berlin to write a show-stopper for the musical. Berlin responded with "Blue Skies", and on the opening night the audience demanded 24 encores of Baker's song. 1927 rendition by Ben Selvin and His Orchestra, recorded under the name "The Knickerbockers", became a number one hit. Al Jolson performed the song in 1927 in the first ever feature-length sound film, The Jazz Singer. Jazz renditions include Benny Goodman's 1938 concert in Carnegie Hall and Tommy Dorsey's 1941 recording with young Frank Sinatra on vocals.