The McGuire Sisters were a singing trio in American popular music. The group was composed of three sisters: Ruby Christine McGuire Dorothy "Dottie" McGuire Phyllis Jean McGuire Among their most popular songs are "Sincerely" and "Sugartime", both number-one hits.

The Chordettes were an American female popular singing quartet, usually singing a cappella, and specializing in traditional popular music. They are best known for their songs "Mr. Sandman" and "Lollipop".