What's a good song to sing for a high school audition?

My school is doing The Spitfire Grill for our musical, and I need an audition song. I feel like I have the range for Percy but I can't find a song. I'm an alto who can hit more higher notes than lower notes. I don't want any Mamma Mia! because I'm afraid that since all the songs are ABBA songs, our director won't allow it. I had a song from Chess that I was doing (Someone Else's Story) but I'm finding that I can't pull it off. The audition isn't until August 1, not that that has to do with anything, but any help would be great. And please don't give me a list of twenty-five songs saying, Here you go! because I really hate that. :)