What movie duo was known by the nicknames "The Singing Capon" and "The Iron Butterfly"?

Nelson Eddy and Jeanette MacDonald were known by the nicknames “The Singing Capon” and “The Iron Butterfly”.

Who played Maya Angelou in the TV movie based on her memoir “I Know Why the Caged Bird Sings” (CBS, 1979)? Constance Good played Maya Angelou in the TV movie based on her memoir "I Know Why the Caged Bird Sings" (CBS, 1979).
Who were the Three Stooges? Making their debut in Soup to Nuts (1930), the Three Stooges were Moe Howard, Larry Fine, and a string of actors in the third role: Shemp Howard, Jerry "Curly" Howard, Joe Besser, and…
What was Carmen Miranda’s ethnic background? "The Brazilian Bombshell", Carmen Miranda, was born in Marco de Canavezes, Portugal, in 1909. She died in 1955.
Which five rulers reigned the longest? With their periods of reign, they are: 1. Pepi II, king of Egypt. 90 years (c. 2566-2476 B.C.) 2. Louis XIV, king of France. 72 years (1643-1715) 3. John II, prince of Liechtenstein.…
Is there anything in astronomy that might explain the Star of Bethlehem? No comets, novae, or supernovae are recorded for 6 B.C., the estimated year of Christ's birth. But there was one odd celestial event that stargazing Wise Men might have observed and thought to…
When was the movie rating system started? The Motion Picture Association of America started the Code and Rating Administration Board in 1968.