Madame Of Opera is a term used to refer to the famous French opera singer, Maria Callas. She was known for her powerful and passionate performances, as well as her unique vocal range. Her career spanned from the 1940s to the 1970s, and she was one of the most influential opera singers of the 20th century. The crossword solution for Madame Of Opera is 'BUTTERFLY', which is a fitting metaphor for her graceful and captivating performances.