NEW YORK — Javier Camarena sang an encore of an aria at the Metropolitan Opera in his second production in less than two years.

The 39-year-old Mexican tenor repeated “Povero Ernesto! (Poor Ernesto!)” during Saturday’s matinee of Donizetti’s “Don Pasquale,” which was broadcast on radio around the world.

Camarena (Ca-ma-RE-na) and fellow tenors Luciano Pavarotti and Juan Diego Florez are the only singers who have performed aria encores in regular performances of full operas at the house since 1942. Camarena also was allowed to repeat an aria in two performances of Rossini’s La Cenerentola (Cinderella)” in April 2014.

He calls the experience “overwhelming.”

Met programs in the 1920s stated, “POSITIVELY NO ENCORES ALLOWED.”