 Kids" for which she won an Emmy Award at the age of 16.De Niese made her professional operatic debut at the age of 15 with the Los Angeles Opera.She became the youngest singer ever to participate in the Young Artists Studio at the Metropolitan Opera, where she debuted in 1998 at the age of 19 as Barbarina in a new production of "The Marriage of Figaro" directed by Jonathan Miller and conducted by James Levine.