Her son, Vaughn Thornton, says Horton died Wednesday night in a Sherman Oaks nursing home where she had been recovering from a stroke.
Horton was a teenager in the Detroit suburb of Inkster when she and some friends formed a group they called "The Casinyets," which was short for "can't sing yet."
When Georgia Dobbins had to leave, Horton became lead singer. The group changed its name to The Marvelettes and Horton was 15 when Motown released "Please Mr. Postman" in 1961. It was a hit and the group had many others. Horton was replaced as lead singer in 1965 and left the group two years later.
