I'm sorry, but i don't have a diet. All advice i could add is, to tell her not to diet, but just to maybe do some more exercise, because if she exercises when she doesn't have cheerleading, she won't put on weight. Also whenever you start saying things like, 'your not fat' and 'its just baby fat' A barrier just forms in her head, making her think 'mums lying'. (trust me, my mum used to say the same things to me)