hit with audiences. and, soon after la scala, he appeared here at the royal opera house, in london. i've been lucky to see him perform here. he is especially popular for his performance in la fille du regiment, by donizetti. his lyric tenor voice, coupled with an impeccable technique, means he is master of the high note. he sings. they used to be called the money notes. - you had to sing those high c's — and if you didn't, the whole - performance was ruined. juan diego's status is one