Flashback: Dolly Parton Writes 'I Will Always Love You' for Former Boss

At 69 years old, Dolly Parton is nothing less than a global icon. Just last summer, she stole the show at England's Glastonbury Festival and released her latest album, the well-received Blue Smoke. But until 1974, Parton was a 28-year-old "girl singer," as she often says, who had come to...