Help!! Pageant dress troubles?

I am gonna be in my school's pageant this weekend, and I just got a dress. the dress is perfect. Red, cutout in the back and just GORGEOUS! The only thing is I am literally flat chested. I am not exaggerating! and this dress is like a size 4, and the boobs are pretty huge! We borrowed it from a friend, and we cannot do anything like stitching, hemming, ext. Please help and give links and/or ideas on how to solve this problem. Thank you!