What do you wear as a guest 2 a pageant?

I'm going to miss mn pageant 2night. I mite see my pageant coach and I would need 2 impress her. I'm 14, I've been in pageants but idk what would be apropet as a guest... thanx bunches. Try 2 reply fast w/ ideas so I have ideas of what dresses and thing would work. Don't worry about heels bc I have pageant heels that r clear so if I don't have something to match ill wear thoses. P.s. it pouring 2 day so yea. Haha