 To avoid embarrassing his family if his show failed and to prevent being blackballed from future vaudeville bookings for having appeared on radio, Tracy decided to make his identity a mystery and borrowed a billing from the title of Frederick Lonsdale's musical "The Street Singer" (1924).Listeners demanded to know his identity, but it was not revealed until five months after his 1931 debut on CBS.The following year he was off to Hollywood to appear in "The Big Broadcast" (1932) with other radio stars, including Bing Crosby, Kate Smith, and the Boswell Sisters.