Here's an interesting tidbit: I tend to tear up when I sing.
Maybe it's because I generally belt things like Disney love songs and Adele when I'm alone, or maybe my tear ducts are just utter lightweights. Whatever the reason, no matter how dry my eyes are while listening to the original, once I throw my full voice behind a song, there's a 95% chance that my eyes will start watering.
Hymns are an exception. My theory is that because I sing them so often, my tear ducts have a higher tolerance for hymns than for other songs. There is, however, a giant gaping hole in this logic: I'm more likely to cry while listening to a hymn.
The moral of the story is that I am easily moved to tears. In fact, I sometimes measure the quality of books and movies by their ability to make me cry. Exhibit A: Great Expectations. I bawled straight through the last five chapters. Fact.
As a parting side note, I may have almost hit that high C in "The Phantom of the Opera" today. Although, since I'm fairly positive I don't have perfect pitch, there's no way to really tell what that almost-note almost was.
Listening to: "Think of Me" from The Phantom of the Opera
Reading: The Subtle Knife by Philip Pullman