I need a good song to sing in my high school talent show? Help out, please!?

Well I wanted to sing in the talent show ever since 8th grade, just turned 16 two days ago and realized I need to be more courageous. I'll be a junior at the time of the next talent show i'm a sopre now. I've always said I would do it but i've never gone through with it. I need some suggestions for a song to sing. I have a good voice for songs like Face Down by The Red Jumpsuit Apparatus or Your Guardian Angel by RJA, And 30 Seconds to Mars' The Kill, and plenty of My Chemical Romance songs, but those arent the right songs for it. So, if you could, help me out! I'd really appreciate it.