NEW YORK, NY - FEBRUARY 20: Opera singers Alyson Cambridge (L) and Sherrill Milnes perform during the Viennese Opera Ball Diamond Jubilee at The Waldorf=Astoria on February 20, 2015 in New York City. (Photo by Andrew Toth/Getty Images)
NEW YORK, NY - FEBRUARY 20: Opera singers Alyson Cambridge (L) and Sherrill Milnes perform during the Viennese Opera Ball Diamond Jubilee at The Waldorf=Astoria on February 20, 2015 in New York City. (Photo by Andrew Toth/Getty Images)