Diane Kolby was an American singer-songwriter active primarily in the late 1960s and early 1970s. She was known for her folk-pop style and her deeply personal lyrics. Her most significant work, "Holy Man," was a hit on the Billboard pop chart in 1971 and was later covered by several artists. Despite her brief career, Kolby's distinctive voice and evocative songwriting made a lasting impact on the folk-pop genre.