I love this tune and this video.
The male singer is “Tom Jobim,” who is also the composer of that beautiful celebratory tune and many other classic bossa nova tunes, more often known in the U.S. as Antonio Carlos Jobim. I had never before heard him sing until I saw this video. The female singer, Elis Regina, melts me with her charm and voice. This must have been a tough tune and they seemed delighted to get this one in the can so beautifully intact. My girlfriend insists that there is no way to sing this song well without dancing while one is singing it. I agree.