What does your LO wear if they are able to dress up one day at school?

Dd1 asked to be rapunzel this year-fluffy dress and long locks. I don't really want to send her for a full day of school in a costume that is just asking to be stained/torn. But she loves being a princess and I don't want her to feel left out on costume day either. Thinking that I may send her in her rapunzel pj dress as an alternative? (haha, is that tacky?)