This melody has a complicated history: it was said to be by Mozart, but it's actually a song called "Amaryllis" by Henry Ghys, who mistakenly attributed it to Louis XIII. Ghys took it from the "Ballet Comique de la Reine". The reason it was cut is even more confusing: according to a review in The Brooklyn Daily Eagle of Nov. 13, 1946 (https://img.newspapers.com/img/img?id..., it may have been shown in some theaters before it was cut. The AFI credits the boy as Warner Lee, but then adds this: "According to an Aug 1945 memo in the file on the film in the MPAA/PCA Collection at the AMPAS Library, the Hays Office complained to producer Joe Pasternak that the film had portrayed Mexicans as only "underlings and servants," and urged him to "find some way to get into your picture some nice Mexicans." Memos in the file also indicate that Pasternak complied with the Hays Office's request by changing the character of the boy who dances with Jane Powell from a French boy to a Mexican boy." French boy? Looks like they just cut the number rather than refilming it.