The multi-instrumentalist Toots Thielemans, one of the greatest artists in jazz, is eighty-eight years of age and continues to record and concertize. He began his career as a guitarist, and in 1959 Hamburg, the young John Lennon and George Harrison often went to hear his noon-time shows with the George Shearing Quintet, but he's perhaps better known for his harmonica playing and whistling. In fact, he is usually considered to be the greatest harmonica player in jazz. He's also a great composer, and one of his songs, "Bluesette", has reached iconic status as one of the most creative and challenging blues-based pieces in the jazz standard repertoire. Here's a really fine version of it: http://www.youtube.com/watch?v=yKnG_9q4crA. By the way, Thielemans is performing tonight in Sint-Niklaas, in his native Belgium.