 For a short time in the early 1940s, Martha Tilton would sing what was formerly the instrumental.Before and during America's involvement in World War II, references to or about the war and the members of the Axis Powers were commonplace on the show.Just after the Japanese attacked Pearl Harbor in December 1941, Jim Jordan, out of character, soberly ended the "Fibber McGee" show by inviting the studio audience to sing "America".