During The Voice of the Prairie, Leon Schwab cuts to a song by Bessie Smith. Bessie Smith was in fact a real singer and quite extraordinary. From Biography.com:
Bessie Smith was born on April 15, 1894 in Chattanooga, Tennessee. She was one of seven children. Her father, a Baptist minister, died soon after her birth, leaving her mother to raise her and her siblings. Around 1906, her mother and two of her brothers died and Smith and her remaining siblings were raised by their aunt. It was around this time that Smith began to perform as a street singer, accompanied on the guitar by one of her younger brothers. In 1912, Smith began performing as a dancer in the Moses Stokes minstrel show, and soon thereafter in the Rabbit Foot Minstrels, of which blues vocalist Ma Rainey was a member. Rainey took Smith under her wing, and over the next decade Smith continued to perform at various theaters and on the vaudeville circuit.
By the early 1920s, Smith had settled down and was living in Philadelphia, and in 1923 she met and married a man named Jack Gee. That same year, she was discovered by a representative from Columbia Records, with whom she signed a contract and made her first song recordings. Among them was a track titled "Downhearted Blues," which was wildly popular and sold an estimated 800,000 copies, propelling Smith into the blues spotlight. With her rich, powerful voice, Smith soon became a successful recording artist and toured extensively. Going forward with an idea presented by her brother and business manager Clarence, Smith eventually bought a custom railroad car for her traveling troupe to travel and sleep in.
In her recording career, Bessie Smith worked with many important jazz performers, such as saxophonist Sidney Bechet and pianists Fletcher Henderson and James P. Johnson. With Johnson, she recorded one of her most famous songs, "Backwater Blues." Smith also collaborated with the legendary jazz artist Louis Armstrong on several tunes, including "Cold in Hand Blues" and "I Ain't Gonna Play No Second Fiddle." By the end of the 1920s, Smith was the highest-paid black performer of her day, and had earned herself the title "Empress of the Blues."
So she would have been popular in the times of Davey and Leon's traveling radio show. If you'd like to hear her for yourself. here's Bessie Smith singing perhaps her biggest hit, "Downhearted Blues."