"Say It Isn't So" (1932) Rudy Vallee performed it on his radio show, and the song was a hit for George Olsen, Connee Boswell (she was still known as Connie), and Ozzie Nelson's band.
The song was written by Berlin twenty years earlier, but he filed it away until 1938 when Kate Smith needed a patriotic song to mark the 20th anniversary of Armistice Day, celebrating the end of World War I [REF].