Country music superstar Dolly Parton had a very early start to her career when she began singing at her local church at age 6. By age 13, she had recorded her first single, “Puppy Love,” which she co-wrote at age 11 with her uncle—and had even appeared on the Grand Ole Opry stage by that time, too, introduced by none other than music legend Johnny Cash.

After high school, Parton immediately moved to Nashville to continue building momentum in her music career. It was there she wrote both hit singles “Jolene” and “I Will Always Love You”—on the same day, no less—two songs that were later cemented as country classics. Her partnership with singer and television star Porter Wagoner in 1967 also helped her gain national recognition.

But what also made Parton so prominent in the music industry was her business savvy. She always retained ownership of her songs, a rare move that helped balloon her wealth to an estimated $650 million. It was especially helpful that she chose to do that when Whitney Houston’s version of “I Will Always Love You” became a global hit in the 1990s.

Notably, Parton even turned down Elvis Presley’s request in 1974 to record the song after his manager Colonel Tom Parker demanded half the publishing rights.