Especially the last time it plays. It completes the entire series.
And then there's Sailor Senshi Shuuketsu, which, if I remember correctly, first plays as Sailor Moon is forced to leave the rest of the Senshi behind to die in the traps of those five monsters and face Beryl alone. Yeah, I cried.
The dub also gave us "My Only Love," which makes the scene where the Moon Princess is revealed.
The dub did this a few times. Even the most purist of fans admit that Carry On, My Only Love, A New Day, and a few others fit the scenes just as well, and in some cases better, than the original.
This troper is especially fond of It's a New Day, and regrets not hearing on his birthday.
And who could forget Oh Starry Night, which was sogood that it sent This Troper into depression for several months because he wished his life was as cool.
"The Power of Love" from the dub version of the battle against Wiseman
How is it possible to forget the Outer Senshi theme. Go on admit that you can expect badass moments whenever this song comes on.
Golden Queen Galaxia, the image song for the villain of the last season, is somehow good enough to make xylophones sound badass. It sounds heartbreaking yet great when slowed down into an "orgel locket" version, too.
Rica Fukami isn't exactly a singing seiyuu like others, but in Route Venus she showed that she can handle more than her own. No wonder Naoko Takeuchi says this is one of her favorite Sailor Moon songs!
And last but not least (by now)? The famous, yet unnamed piano song from episode 110, featured when the Inners think of the Outers and are depressed as they realize how different they are, while Michiru comforts a doubtful Haruka. Starts around 7:35.