Yvonne Kenny when she replaced, with only four days' notice, the soprano scheduled to sing in an Opera Rara concert performance of Donizetti's "Rosmonda d'Inghilterra" at the Queen Elizabeth Hall. It was a triumph and the virtually unknown Kenny became an overnight star. She made her debut at the Royal Opera House the following year, in the premiere of Hans Werner Henze's "We Come to the River", later singing in Handel operas such as: "Semele", "Alcina", "Giulio Cesare", and such Mozart operas as: "Idomeneo", "Mitridate, re di Ponto", "La clemenza di Tito", "The Abduction from the Seraglio", "The Magic Flute". She also
Lisette Oropesa at the Ravinia Festival as Susanna in "Le nozze di Figaro", conducted by James Conlon; for Opera New Jersey as Lucia in "Lucia di Lammermoor"; at Arizona Opera as Gilda in "Rigoletto", again as Lucia; and at the New Orleans Opera as Gilda and as Leïla in "Les pêcheurs de perles". In April and May 2012, Oropesa appeared with the Pittsburgh Opera as Konstanze in a production of "The Abduction from the Seraglio" set on the Orient Express in the Pasha's private train car. In October 2012, she again performed the role of Lucia with the Arizona Opera to success.