 Her last performance at the Met was as Prince Orlofsky in "Die Fledermaus" on January 13, 1990.Boozer has also performed with other opera companies including the Arizona Opera, the Frankfurt Opera, Glyndebourne Festival Opera, Los Angeles Opera, The Netherlands Opera, Opera Memphis, Opéra National de Lyon, Paris Opéra, Pittsburgh Opera, Portland Opera, the Royal Opera, London, San Diego Opera, Teatro Comunale Florence, and the Teatro de Santiago among others.She has also performed in operas at the Caramoor International Music Festival, the Festival dei Due Mondi, and the Spoleto Festival USA.