But anyway, when I was doing range videos for some singers, I noticed how some of them are either just really good at one note, or they have one note that can really stand out for them. Not that they're bad at any other notes, just that there's a certain note (or possibly two) they can either hit with such ease or that's just really special for them. The notes in question might not even be significantly high or low, but they should be executed really well.
For example (using examples from my own threads because they're the ones I know best), Jewel is really good at singing F♯5's. They always sound very clean and effortless for her. Fiona Apple, meanwhile, is good at hitting effortless E3's, as she's a contralto, and they don't sound to be even a slight stretch for her.