It was a guitar-based folk song,” Lieberman, 73, said about the 1971 song that Flack recorded in January 1973. "My version was a small folk song."Flack won two Grammys for "Killing Me Softly with His Song": record of the year and best pop vocal performance,

The singer, pianist and four-time Grammy winner had two other No. 1 hits with "The First Time Ever I Saw Your Face" and "Feel Like Makin' Love."

Roberta Flack's intimate vocal and musical style on "Killing Me Softly with His Song" and other hits made her one of the top recording artists of the 1970s and an influential performer long after.