Dodie Stevens didn't write "Tan Shoes", it was written by Mickie Grant. She was 13 when it became a hit though--
Sue Thompson, who sounded even more like a teenager,was 35 when she had her first big hit, "Sad Movies Make Me Cry"--she was married to, and working with, Hank Penny at the time, and had been performing Western Swing since the 40's--All her big " teen " hits, including Norman, Sad Movies, Paper Tiger, and "James, James, Hold the Ladder for Me" were written by John D. Loudermilk--

Dodie Stevens career as a teen star ended at the ripe old age of sixteen, and, curiously. later turned up as a back-up singer for Sergio Mendes and Brazil '77--,