Sing It to Win It?

I'm entering a talent show for singing, and I'm lost on what to sing. I'm 11, and I love Broadway Musicals (peter pan, hairspray, annie, WICKED, etc.) and Country music (Tim McGraw, Rascal Flatts, Kenny Chesney, Faith Hill, Brandi Carlile etc.) These aren't songs popular for my age group, but I'm not sure what to sing at all!!! Any Ideas?