Billie Holiday revolutionized jazz singing by treating her voice as an instrument capable of profound emotional expression. Her phrasing, intonation control, and ability to bend melodies around the beat became foundational techniques for generations of jazz vocalists and remain essential study for anyone learning to interpret standards.
Holiday's approach to melody and lyric interpretation established a template for jazz pedagogy: sing behind the beat to create intimacy, shape phrases with intention, and let the lyrics guide your musical choices. Her recordings remain primary sources for understanding how standards should breathe.