The McGuire Sisters

#1 for 10 weeks 1955
Written by Harvey Fuqua and Alan Freed

The best-selling version was a pop cover recorded by The McGuire Sisters, entering the charts in 1954 and reaching number one the next year.
~Source Wikipedia

The McGuire Sisters were a singing trio in American popular music. The group was composed of three sisters: Christine McGuire (July 30, 1926 December 28, 2018); Dorothy McGuire (February 13, 1928 September 7, 2012); and Phyllis McGuire (February 14, 1931 December 29, 2020). Among their most popular songs are "Sincerely" and "Sugartime", both number one hits.
~Source Wikipedia

The McGuire Sisters