please please help me

im planning on doing an awesome song that ive worked so hard on for my schools talent show and im playing piano for it and its amazing but really really hard buy ive learned it and i auditioned today and got in, but now my parents are making me choose between the talent show and a vacation and we cant postpone either one of them. im so stressed what should i do?????!!!!!! (im doing im letting go by francesca battistelli)