Ms. Harris has appeared in leading roles with opera companies and orchestras throughout the world.  In North America, she has been heard at the Metropolitan Opera (Vitellia in La Clemenza di Tito), The Washington Opera (title role in Agrippina and Donna Anna in Don Giovanni), Washington Concert Opera (title role in Roberto Devereux), Minnesota Opera (title roles in Norma, Ermione, Armida and Semiramide, and Vitellia in La Clemenza di Tito), New York City Opera (title role in Handel’s Agrippina, Donna Anna), Austin Lyric Opera (Chrysothemis in Elektra and Katarina in Shostakovich’s Lady Macbeth of Mtsensk), Atlanta Opera (Desdemona in Otello, Donna Elvira in Don Giovanni, and Countess in Le Nozze di Figaro), Michigan Opera Theatre (Norma and Countess), Arizona Opera (Lady Macbeth in Verdi’s Macbeth), Opera Theatre of St. Louis (Countess), Opera Pacific (Rosalinde in Die Fledermaus and Donna Anna), and Utah Opera (title role in Ariadne auf Naxos).

In Canada, she has sung leading roles with the Canadian Opera Company, Montreal Opera, Edmonton Opera, Opera de Quebec, and Vancouver Opera.

In Europe, Ms. Harris has appeared in Spoleto, Italy as Eva in Die Meistersinger, with Opera du Rhin in Strasbourg as Vitellia in La Clemenza di Tito and the title role in Barber's Vanessa, and most recently again as Vanessa with Teatro Massimo in Palermo.

In 2006, Ms. Harris debuted the Strauss Four Last Songs with the New Haven Symphony as well as Vaughan Williams’ Sea Symphony under Maestro Keith Lockhart and the Utah Symphony.

In 2007, she will return to the role of Lady Macbeth (Verdi) with Edmonton Opera as well as the role of Tosca with the Cleveland Opera, and will rejoin Chicago’s Music of the Baroque with Jane Glover conducting.  She will also return to Austin Lyric Opera for the season opening Gala.

Ms. Harris has recorded leading roles for Newport Classic, including Scarlatti's Ishmael, Haydn's La Cantarina and The Creation, and on Vox, Handel's Tolomeo.

On the concert stage, she has also performed as soloist with the St. Louis Symphony, The Orchestra of St. Luke's, Honolulu Symphony, Buffalo Philharmonic, and Boston Baroque as well as numerous Carnegie Hall performances with the Oratorio Society of New York.