El murciélago
In 1951, De Carlo accepted an offer to open the thirtieth season of the Hollywood Bowl singing the breeches role of Prince Orlovsky in five performances of the opera "Die Fledermaus" ("The Bat"), from July 10 to 14. The performances were conducted by noted film composer Franz Waxman. In her autobiography she described her participation in "Die Fledermaus" as "a rewarding experience, the aesthetic highlight of my life."