I have an audition tomorrow...

and I don't know what to sing.

All my previous teachers have had be do belting pieces - other than that one classical teacher, but I don't know any of the classical songs well enough since we worked mostly on technique. Sighs. Belting pieces don't work because this is a choir audition...not a "hey look how loud, powerful and awesome I am!"

Belting pieces also change my range to alto. I am naturally a soprano. What's a girl to do? Help?