Juilliard Pre-college

Hi, I am auditioning for the pre-college program at Juilliard for voice later this month. I’ve received everything about my audition itself but I was also wondering:
How many people usually get into this program?
What should I wear to the audition?
What are the “judges” looking for?
& what are some other information I should know.
I know the answers to these questions all vary but I would be grateful if I could any opinions/answers!

How’d it go?