Originally "Sincerely" was a doo-wop song by the Moonglows and 1954 a minor hit in the United States. The best-selling version of the song was a traditional pop cover recorded by the McGuire Sisters, which reached the no.1 position and was eventually certified as a gold record for one million copies sold. By the way, co-writing credits were shared by Moonglows band member Harvey Fuqua and disk jockey Alan Freed. After it became known that Freed has inappropriately claimed songwriter credits for songs by bands he promoted (associated with his downfall in a payola investigation years later), Fuqua noted that Freed had in fact contributed to the songwriting for "Sincerely", thus his claim to a songwriting credit in this case was legitimate.