Gladys Horton, 66 co-founder of Motown group Please Mr. Postman was certified gold in 2004, 43 years after it hit the charts . Motown founder Berry Gordy during the 1960s did not release sales information on songs from his record labels. So, Gladys Horton, 66  ( lead singer and co-founder of the Motown group “Marvelettes”) […]