Miami's preteen R&B singer Sammie was exposed to music even before he was born. His mother, a former professional singer, sang in the church choir while she was carrying him. Fittingly, Sammie's first singing triumph also occurred at church; at age four, he received a standing ovation for his performance of "Troubles Don't Last Always." Music was never far from Sammie's mind, even at school; teachers would catch him singing under his breath during classes, but encouraged his talent. Eventually, a music teacher from Charles Drew Elementary, a nearby magnet school with a special...