What do you wear to a Disney audition?

I have an audition coming up for Character look-a-likes, character performers, and parade movers. The description says that all applicants will be taught a movement routine and that we should wear comfortable clothes and shoes. No sandals or flip-flops. I was thinking that yoga pants, tennis shoes, and an athletic tank top would be fine, but my friend's mom brought up professionalism and first impressions. It's my first audition and I want it to be good so if someone could help me out by giving me a suggestion of what to wear it would be greatly appreciated.