Question: Which American actor, screenwriter, director, producer, singer-songwriter and author sang this song from the 1971 movie "Willy Wonka & the Chocolate Factory" that was written by British composers Leslie Bricusse and Anthony Newley?
Sentence (from "Pure Imagination"): "Pure Imagination" is a song from the 1971 movie "Willy Wonka & the Chocolate Factory".
Relevant evidence: Yes