Kathleen Ann Cassello (August 13, 1958, Wilmington, Delaware – April 12, 2017, München, Germany) was an American-born opera singer. Since winning first prize in the Salzburg Mozart competition in 1985, she toured extensively throughout Europe, Asia and North America. A graduate of the University of Delaware, she received a Bachelor of Science in Nursing degree in 1980. In the late 1990s, she toured with Kallen Esperian and Cynthia Lawrence as “The Three Sopranos”.
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