- Their hit recording "Sincerely" spent more than two months at No. 1 on the charts in 1955. "Sugartime" and "Something's Gotta Give" also reached the top 10.
- They were often mistaken for triplets; however, Christine was born in 1926, Dorothy in 1928, and Phyllis in 1931.
- They were born in Middletown, Ohio. They sang at church performances, and were discovered by an talent agent who heard them sing at a revival meeting in Dayton.
- The trio disbanded after a performance on "The Ed Sullivan Show" in 1968. Phyllis continued to perform solo. Christine had numerous business ventures, franchising cinemas, restaurants, and diet centers. Dorothy, who in 1958 married real-estate developer Lowell Williamson, became a full-time wife and mother.
- Christine McGuire - Born: July 30, 1926 in Middletown, Ohio Died: December 28, 2018 (age 92) in Las Vegas, Nevada Dorothy McGuire - Born: February 13, 1928 in Middletown, Ohio Died: September 7, 2012 (age 84) in Phoenix, Arizona Phyllis McGuire - Born: February 14, 1931 in Middletown, Ohio Died: December 29, 2020 (age 89) in Las Vegas, Nevada.
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