There aren’t many classical music luminaries that could qualify as pop culture heroes these days, but tenor Placido Domingo is unquestionably one of the few. “While Luciano Pavarotti and Jose Carreras have eased into retirement, Domingo at 66 remains at his artistic peak. Since his debut in 1959, he has sung a record 128 operatic roles. Next year, he celebrates the 40th anniversary of his debuts at the Metropolitan Opera and Lyric Opera of Chicago.”