Hairspray audition song help?

Hi there, I'm auditioning for Hairspray (later this week!) and I'm looking for a good song. It'd be for the lead and I have the body type and hair for it. I've never tested my range but I can sing Think Of Me from Phantom and Green Finch and Linnet Bird from Sweeney Todd with no trouble and I can go rather low. I've never auditioned before but I'm fairly confident in my singing and acting abilities. I need some experience under my belt if I'm going to act professionally, any suggestions?