"Sugartime" is a popular song written by Charlie Phillips and Odis Echols, and published in 1957. The biggest hit version was by the McGuire Sisters, whose recording of it topped the Most Played chart in February 1958. It was also the second number 1 Billboard single for the trio after 1954's "Sincerely". The song refers to the Jimmie Rodgers tune "Honeycomb", which had been recorded a few months earlier in 1957.
~Source: Wikipedia

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