John Hendricks (1921-2017) was an influential American jazz vocalist and educator, renowned for his pioneering work in vocalese, a style that sets lyrics to existing jazz instrumental compositions. He was born in Newark, New Jersey, and his career spanned several decades, during which he collaborated with prominent musicians, including instrumentalists like Count Basie and orchestras such as the Gerald Wilson Orchestra. Hendricks is best known for his groundbreaking album "Sing a Song of Basie" (1960), which showcased his ability to weave complex lyrics into classic jazz melodies. He was also a member of the vocal group Lambert, Hendricks & Ross, which played a crucial role in popularizing vocalese through innovative arrangements and harmonies. His impact on music extends beyond performance; he was a dedicated educator, teaching at several prestigious institutions, including the University of the Arts in Philadelphia. Hendricks' work helped to elevate the art of vocal improvisation and inspired countless musicians, making him a significant figure in the evolution of jazz. His contributions continue to resonate within the genres of jazz and vocal music, influencing generations of artists.