One of the most beautiful songs I've had the great pleasure and honour of singing.(Renata Tebaldi singing "Un bel di vedremo" from Puccini's Madame Butterfly.) And I was there, NYC Metropolitan Opera 1959
"The Humming Chorus", from Puccini "Madame Butterfly", Andre Rieu conducting. The video itself is dedicated to a friend. The chorus is so uplifting; whereas the entire opera is quite sad (you have permission to skip it if you prefer!