Janowitz appeared on many of the great stages of the world, including Glyndebourne Festival Opera, the Bayreuth Festival, the Salzburg Easter Festival, the Metropolitan Opera, the Paris Opera, La Scala and the Royal Opera House. In 1980, she sang the part of the Countess in a now legendary new production of "The Marriage of Figaro" (with Georg Solti as conductor, Giorgio Strehler as director and Ezio Frigerio as set designer). Her recording of Schubert's "Lieder" for female voice has been twice awarded Germany's Deutscher Schallplattenpreis.