I'm not really a fan of musicals as a whole but I quite like the song "Bring him Home" from Les Miserables. Then I was listening to 6 Music this afternoon and they played Puccini's "Humming Chorus" from Madame Butterfly. The similarity is unmistakable. More than a coincidence because after...
I'm quite partial to a bit of Wagner myself. Mind you, so was Hitler.
https://www.youtube.com/watch?v=lqk4bcnBqls
https://www.youtube.com/watch?v=SRmCEGHt-Qk