Note for Note

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The inimitable Bobby McFerrin leads a very happy and unworried audience in what he does best ~ creative vocal improvisation (video): http://www.ted.com/talks/bobby_mcferrin_hacks_your_brain_with_music.html
McFerrin's best-known song, "Don't Worry, Be Happy," made for an amusing music video: http://www.youtube.com/watch?v=d-diB65scQU