Image: circa 1940 from https://www.otrcat.com/p/in-person-dinah-shore .
“Frances ‘Fanny’ Rose Stein remade herself into Dinah Shore shortly before beginning a career on America’s airwaves with the debut of her variety show on NBC Radio on this date in 1939. She would continue to be a cultural force in the United States for over fifty years.”
Excerpt from https://jwa.org/thisweek/aug/06/1939/dinah-shore .
Another source shows her being on the air in 1939 but not having her own show until several years later: http://otrarchive.blogspot.com/2009/11/dinah-shore.html . At the link, scroll down to read about her.