Sarah, full name Sarah McLachlan, is a renowned Canadian singer-songwriter known for her emotive mezzo-soprano vocals and piano-based melodies. She emerged in the late '80s with a folk-pop style, drawing influence from artists such as Joni Mitchell and Peter Gabriel. McLachlan's significance in music history is underscored by her creation of Lilith Fair, a festival highlighting female musicians, and her influential albums like "Surfacing" and "Afterglow". Her distinctive sound is characterized by introspective lyrics and ethereal instrumentation, making her a valuable figure in the adult alternative genre.