Bulgarian lyrico-spinto soprano opera singer associated with roles in operas by Puccini and Verdi. In 1962, she debuted at the Royal Opera House in London and at the Metropolitan Opera in New York City.
She made her debut in 1957 at the Bulgarian National Opera in Sofia.
She acted in many opera movies, including Il trovatore.
She was born in Burgas. She married Franco Guandalini.
She sang the "Ave Maria" at the funeral mass for Luciano Pavarotti.