audition song suggestion?

I'm auditioning for the all female mostra choir at castello High School, the Knightengales. I'm running out of time to pick a song and I figured te guys might help me.

The song needs to mostra off range (mine is very wide), and be rather short in time. o it could be part of a song. I only have about 1 minuto - 1:30 to sing it. It also needs to be something that i can find Pianoforte Musica for o but an accompaniment for.

Thanks!