Just a random observation this. There’s a little snippet of Les Patineurs (the red girls pas de deux, for which the music was taken from the Prelude to Act III of l‘Étoile du Nord) which is almost note-for-note the tune of “Dites-Moi pourquoi la vie et belle” from South Pacific.
For comparison, see/hear below—though I’ve no doubt the South Pacific clip will go offline before long