Marta Eggerth, 'the Callas of Operetta,' Dies at 101

Marta Eggerth, an operetta star in Europe and the United States who was almost certainly the last living link to the grand musical confections of Franz Lehar and Emmerich Kalman, died on Thursday, December 26, 2013 at her home in Rye, N.Y. Marta Eggerth was a Hungarian-born singer/actress from "The Silver Age of Operetta". Many of the 20th century's most famous operetta composers, including Franz Lehár, Fritz Kreisler, Robert Stolz...She was 101....NYTimes Obit
A coloratura soprano, Miss Eggerth was often called “the Maria Callas of operetta” for her vocal facility, great charm and sheer ubiquity — in opera houses, on the concert stage, in the movies and on Broadway — in the 1930s and long afterward. Wikipedia