ETA: wow, that was fast! She's got a name: World on Ice Belle. Don't know why she needs another face sculpt just for ice skating, but there you go. Also - as I scrolled down through the comments on that photo, I realized I had in fact left a comment years ago, saying how much I liked her face. Well, at least we know my amazing taste has remained consistent through the years. (Also see Jawn Pickles' link below for good shots of her sculpt without the paint.)
Don't worry, I haven't given up the plastic entirely! On Monday I made a little pilgrimage to the new crafts store, and also took the opportunity of popping into the nearby goodwill. There I found this Disney doll that I'm having a bit of trouble identifying. Her hairstyle leads me to think she's a Belle, but the face mold doesn't look like any Belle I've seen. Back of neck says (c) DISNEY, MADE IN CHINA, body is stamped CHINA. No other markings. I would guess she's a clone, but they're not usually stamped with the original's copyright, are they?
As usual, I bought her for her face. She has a fairly straight nose, closed mouth, and almost Lagoona-like bulging eyes (also the paint is a bit wonky). No holes for earrings, which seems to be unusual among these dolls. I guess that could mean she's a "village Belle" and came in some version of the blue dress.
The body is kind of weird. It certainly doesn't look like Mattel (although I know I tend to underestimate how weird-looking older Mattel dolls can be). The neck knob makes me think Simba, but I don't recognize this body type from them either. My other articulated Simba Disney princesses has more or less same body as the old articulated Steffi Love, which doesn't really look like this one.
So far the closest I've got to a match is this slightly odd-looking Belle, who according to the comments is an older Disney Store doll. I'm not sure they're the same, but at least that proves there's some variety among the Belles out there.