Flagstad and Melchior. Zeani and Rossi-Lemeni. Rysanek and Vickers. Price and Berganozi. Sutherland and Horne. Brownlee and Camarena. Callas and Di Stefano. Each were consummate musicians in their own right, but when they performed together, the combined force of their star power was electric! In this episode, Met Radio commentator Ira Siff takes us through the second part of his popular opera duos series.