i depends on your voice range, put a few up on youtube and then send me links to it, and i will be able to help you, i auditioned for The X Factor online already, anyway, i have a few videos up on youtube, my channel is preppyboy97 if you could give me some feedback, that would be cool, and you can send me your videos and i will give you feedback.
Depends on what your specialty is. How would you describe your voice? Strong? Soft? Loud? Raspy? That's what will help you pick a song, identifying your voice 'type' and picking a song based on what fits that type :) hope it helped!