DO NOT sing "Girl you're a Woman" ; that is a song for a middle aged woman giving advice to a young girl. Nothing turns a casting director off more than someone young singing lyrics that reveal the wisdom that comes w/ age.
Look at Pump Boys and Big River, both "faux" country shows from the same era. Mary Jane's ballad from BR is appropriate, and several of the up-tempos from PB&D. Both vocal selections books are easy to come by.
The only thing you should need to know from the show is a verse of "Hard Candy Christmas".
Due to your youth, the only role they would put you into is "Shy". Work on a white-trash TX accent and be prepared to cold read.
Also bring dance clothes. Even if you don't consider yourself a dancer, they will need to see your physique, as the chorus is scantily clad throughout the show.
I'd fire you... if you weren't so g*dd*mn beautiful out there. - Blades of Glory
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