"No puede ser" was sang in the 1990 concert of a popular operatic singing group whose first performance was on what date?
No puede ser: "No puede ser" (It cannot be) is an aria sung by Leandro (tenor) in the second act of the zarzuela, "La tabernera del puerto", composed by Pablo Sorozábal to a libretto by Federico Romero and Guillermo Fernández-Shaw. No puede ser:  One of the most famous arias in the Spanish language, "No puede ser" has been part of the concert repertoire of many Spanish tenors, including Alfredo Kraus, José Carreras and Plácido Domingo who sang it in the 1990 Three Tenors concert. The Three Tenors: The Three Tenors were a popular operatic singing group during the 1990s and early 2000s, consisting of Spaniards Plácido Domingo and José Carreras and the Italian Luciano Pavarotti. The Three Tenors:  The trio began their collaboration with a performance at the ancient Baths of Caracalla in Rome, Italy on 7 July 1990, the eve of the 1990 FIFA World Cup Final.
7 July 1990