Flashback: See Dolly Parton's Twinkling 'Come Again' in 1978

Since her debut more than 50 years ago, Dolly Parton has become one of the world’s most recognizable entertainers and cemented her reputation as one of popular music’s most successful songwriters. But in the mid-Seventies, when she walked away from a lucrative partnership with Grand Ole Opry star Porter Wagoner…