La Vida Es Un Carnaval - Celia Cruz

"No, you should first learn the art of comfort of this world, you should learn to laugh, my young friends, if you are really determined to remain pessimists" (Nietzsche The Birth of Tragedy, 12).
Arguably one of Celia Cruz's seminal pieces, this song describes laughter being being the key to the enjoyment of life, much like Nietzsche expresses to his pessimistic readers.  The song is, in my opinion, incredibly uplifting and cheerful.