Interesting tidbit about Disney’s Mulan (animated):

In all Disney animated movie, singalong songs are the norm. Except, that is, for the animated Mulan movie. The last song they sing is this one, which ends abruptly as they arrive to join forces with the main dude’s father’s army. They were all wiped out by the enemy before they got there. After that, the rest of the movie is somber and includes no more sing along songs.

Also, it was the first movie to include CGI with hand-drawn animations.