She spent most of her career in the United States and Germany .
Ibolyka Astrid Maria Varnay ( 25 April 1918 -- 4 September 2006 ) was a Swedish - born American dramatic soprano of Hungarian descent .
Ibolyka Astrid Maria Varnay spent most of Ibolyka Astrid Maria Varnay 's career in American   States and Germany .
Ibolyka Astrid Maria Varnay ( 25 April 1918 -- 4 September 2006 ) was a Swedish - born American dramatic soprano of Hungarian descent .