The McGuire Sisters were a singing trio in American popular music. The group was composed of three sisters: Christine McGuire (born July 30, 1926); Dorothy McGuire (February 13, 1928 – September 7, 2012); and Phyllis McGuire (born February 14, 1931). Among their most popular songs are "Sincerely" and "Sugartime", both number one hits.
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