All these posts in and no mentions for Disney movies? Do they not qualify under some reason I’m not getting? (I’m not at all knowledgable of musical/stage tradition, so that’s actually a serious (not snarky) question).
To me, the finest opening number is Belle in Disney’s Beauty and the Beast. With no less than 22 separate singing voices, each one getting their own measure in the sun, plus four different ensemble arrangements, the song itself shows a songwriter, Howard Ashman, at the height of his powers… right before he died of AIDS.
Let’s start with the basics: co-written with Alan Menken the song is rich in exposition and personality… at the end you know who these people are, what they do, what they’re like. There’s a bit of foreshadowing
it introduces the major conflicts, it kicks-starts the plot… it pretty much does everything you wish of an opening number. And it’s bouncy as all hell.
What makes the song really special, imho, is it’s relationship to the rest of the movie. Actually, to go on a wider tangent, Menken’s entire soundtrack* is a wonder, one of the most thought-out pieces of movie music I’ve heard, and it starts off with “Belle” (actually, it starts off with the Introduction, but, dammit, I’ve gotta point to make!
). Musically, BATB has a richness of themes that are fully developed and utilized throughout the film, all of them coming together in the end in the final moments, a consideration to the overall musical structure that I really don’t hear all that much in motion pictures. (In a lot of movies, it sounds like the soundtrack is scored as the dailies come in. Other movies repeat the same 1 or 2 melodies into your head - Fantastic Four is a pretty bad offender in this respect).
For example, the theme that you first hear when Belle sings, in the middle of the song when she’s looking at the book
is repeated many times in the film, most importantly when the Beast becomes a Prince. As you watch the transformation, the “isn’t this amazing?” theme repeats as the Beast rises from a near-death, turning human, the music growing ever more confident with each repetition. As the movie ends, you hear snippets of the major melodies of many of the songs, finally ending with the title song.
There’s a lot of love and respect for the material in this movie; it seems one of those films where everybody realized that they were working on something special, which inspired them even more. There’s a level of craftsmanship and competence on the part of the artists involved that comes through, easily seen on the screen, even 15 years after the films release.
*He and Ashman worked ala Elton John and Bernie Taupin. Menken wrote the music for BATB and Ashman was responsible for the lyrics. I’m sure there was a lot of crossover, but that seems to be the general division of labor for this film.