Conductors with whom she has appeared include Abbado, Bernstein, Giulini, Karajan and Solti.
She has also been a prolific and eclectic recording artist, and has made many appearances on television.
A high, lyric mezzo-soprano able to sing music more usually undertaken by sopranos, she is especially associated with the bel canto and French repertoires and with contemporary American music, particularly the works of Jake Heggie.