What should I do (stupid bleepin 20 characters)?

The talent show is tomorrow. I can sing the song I'm doing acapello. We are not suppost to sing acapello. I have the karaoke finally. I canNOT do the karaoke. I just can't. It doesn't make sense to me. It starts abruptly, the tempo is faster than what I'm used to and I don't know when I am suppost to come in. Should I get up on stage in front of the school and make a fool of my self or just drop out and forfeit from the talent show and be known as a chicken and a failure at life for all eternity? Either way I think I'll die. =(