Baron Jean-Baptiste Frédéric Isidor "Toots" Thielemans (born Brussels April 29 1922) is a Belgian jazz artist well known for his guitar and harmonica playing: also for his highly accomplished professional whistling. He is often credited by jazz afficionados and jazz critics alike as being one of the greatest jazz harmonica players.
He moved to the US in 1952 where he was a member of Charlie Parker's All-Stars.
A jazz standard by Toots Thielemans is "Bluesette" where he used whistling and guitar in unison. Bluesette became a major 1962 world-wide hit for him, and this still much loved and requested piece has been re-recorded by him (plus many others!) and commercially released on records/CDs many times over both in various studio versions and live on-stage performances performed in several different countries.