How do I encourage my daughter to do better in ballet?

My daughter is only seven on a beginning comp team, she’d really like to move up next year and I think she has a chance—but only if she puts more effort into her required ballet class. Problem is, she doesn’t like it and claims it’s too “boring” so doesn’t give it the same attention that she gives to tap, contemporary, and jazz. Does anyone have advice on how I can explain how important ballet is? How to make it more “fun” or help her like it more? Any and all advice would be greatly appreciated!