Imagine a stage with a 1940s- or 50's-era aesthetic, set with only the instrumentalists and backup singers for some major male music star. The star doesn't seem to be on stage, but the musicians start the show anyway, coordinated swaying and all. About eight measures into the music, you notice that the soloist is actually present, hidden among the backup singers, joining in the swaying and drawing no attention to himself; just crooning softly, participating.