HELP WITH SHARPAY AUDITION!?

So i am involved with a theater summer camp! i was a lead in our show last year. This year we are doing high school musical and i have always loved sharpay! my best friend wants to be ryan and i would love to play sharpay with him! we do single auditions and i am a mezzo belter and i feel like i sing the part very well! i am blonde and am known for my facials being the best! but i am very sweet and i have shoulder length hair but would get a wig. im kinda nervous because i want it so bad and i wanted to know if anyone had some advice for me?