Are you a senior right now? Do you play an instrument? What is your dance, acting and vocal background? Have you written/produced any kind of original work?
When it comes to standing out in the audition it is most important to choose material that showcases YOUR personality/type. Choose songs that sit comfortably in your range - not the extreme top/bottom (unless it’s killer). Choosing “comfortable” material allow you to expend your energies playing yourself at your best. There are plenty of auditionees out there who are trying to push every envelope - thinking THAT will make them stand out. Let the auditors get to know YOU. Let your light shine.