What to do right for an American Idol audition?

I plan on auditioning 4 Idol next year and want to sing either some r&b songs like Aaliyah, Brandy, Alicia Keys here’s my youtube account

http://www.youtube.com/user/BlondeRussianKid

any advice for planning what to do or not to do, what to sing or not sing, what to be careful for, and if I’m good enough for idol any advice would help
thanks!!