“Sincerely” is a popular song written by Harvey Fuqua and Alan Freed and published in 1954. It was originally recorded by The Moonglows, who scored a #1 single on the Billboard R&B chart and #20 on the Billboard Juke Box chart. 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.