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
Marta Belen locations around the United States, Brazil, Portugal, and Spain. She sang for the Tucson Opera (now the Arizona Opera) and the San Francisco Opera. She sang the principal soprano role for "La Traviata", "Madame Butterfly", and "La Boheme", as well as performing in "La Sonnambula", "Daughter of the Regiment" (La fille du régiment), "The Magic Flute", and "The Abduction from the Seraglio". In the late 1970s she recorded Rachmaninoff's art songs with Paula Fan accompanying. Marta married Roger Irwin in 1962. They later divorced in 1976. She married David Hutchinson in 1983. In 1966 she began studying Buddhism, and lived