I found the movie 'Red Shoes & The Seven Dwarfs' online and just finished watching it. It's really very good with great characters, a cute heroine and a very positive message about accepting yourself. Here's the link if you want to check it out.
I saw it and it was really cute! Minor spoilers but the fat girl is really body positive and likes her body the way it is, she just hates that people only tend to help her when the magic shoes make her temporarily skinny. Also she's strong and badass when she's fat but when she's fat but loses her strength when she's skinny, so it's nice to actually see it portrayed that there are some things fat people can do that thinner people can't instead of the other way around.