Who Were The Marvelettes?

The Marvelettes were formed in the late 50's by five students at Inkster High School in Michigan, U.S.A.:
Gladys Horton,
Georgeanna Marie Tillman (d. 6th January 1980),
Wanda Young,
Katherine Anderson
and Juanita Grant.
The Marvelettes were an American singing girl group on the Tamla label. Motown's first successful female vocal group, the Marvelettes are most notable for recording the company's first #1 Pop hit, "Please Mr. Postman", and for setting the precedent for later Motown girl groups such as Martha and the Vandellas and the Supremes.