What song should i sing to audition for "america's got talent" in atlanta, ga.?

i am 16 years old and i am stuck between a few songs. first off, i cannot belt high notes. i am a soprano but i just can't belt high notes. some songs i was thinking of are "russian roulette" by rhianna, "you light up my life" by debby boone, and "i told you so" by carrie underwood. each one of those, i am having trouble on some chorus parts because of how high it goes while i'm belting. i will be trying out without music so i can sing a key or two lower. i need to know what type of song you think the judges will like better. if you have any other suggestions, i'm open to them. i only have three days though and i'm stuck between what song to choose. please help asap! :) any tips at all are welcome, but please no rude comments like i got last time. lol. :)