Maria Callas and Renata Tebaldi: two twentieth-century opera stars who struggled with the competitive nature of their careers. Both divas held different artistic viewpoints that may have contributed to their rivalry. While Callas believed that singing was about reflecting the soul of a character, Tebaldi thought it was more important to create a beautiful vocal line. Below are two clips of “Un bel di vedremo” from Puccini’s Madama Butterfly. The first is performed by Callas and the second, Tebaldi. Do you find that you prefer one over the other?