audition song suggestion?

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

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

Thanks!