I have to agree that her hips look kinda weird. But it's a nitpick. You really dodged the Uncanny Valley that is so easy to fall into with realistic rendition of cartoon characters, but you went further and actually captured her beauty. I can already hear her singing Stronger Than You in my head. The only thing that seems like it could be improved is making her hair look more like real hair instead of a single, uniform mass, though that may prove counter-productive. Do you plan on drawing other characters from Steven Universe? I'd really like to see what Amethyst looks like in your style.