Betty's sitting on a big secret: she's not really a ballerina. It's just dress-ups.
Betty's been going with the persona since she was mistaken for the real thing on her way to a fancy dress party, but in truth lacks the discipline for such a demanding profession.
Betty's more your laid back, 'have another piece of cake, let's have a sleepover' kind of gal. But shhh...don't tell anyone!