Dolly Parton, country music’s best blonde balladeer, has always been self-assured. “I’ve always had a lot of confidence in my talent and in my personality,” she once said. “The way I am, the way I dress, the makeup, the hair – this is fun for me,” in what is a quintessentially Dolly inspirational quote. But the confidence stems from a long career spent working hard at her craft. Parton is one of 12 children and has touched on the poverty she gre…