I need Help ASAP!!!?

No, it is a terrible idea. Talk to your parents about this. Maybe you do need to lose a little weight but you need to do it in a healthy way. There really is no magic answer to weight loss. There is no secret solution, no mystery. Simple things you do can help tremendously. Eat a healthy diet of about 1500 calories a day - you do need to learn to count calories to some degree, and there are tons of sites that will help you with that, as well as the labels on foods. Start keeping a record everyday of what you eat, because we all usually tend to consume more calories than we think we do. Eliminate ALL junk food, sodas, pop, sweets, fried foods, fast foods, fruit juices, and processed foods. Everyday eat a healthy diet of fruit, veggies, a few nuts, lean meat and fish, whole grain breads and cereals, low fat dairy products. Go for a brisk 45 minute walk twice a day if you can, everyday. Climb lots of stairs. Drink plenty of water. If at all possible start a weight lifting/strength training program at a gym and get some instruction from the gym trainer. It will work.

Of course it isn't. If we could all be thin by drinking water for a while, no one would be fat. Lose weight the correct way, by cutting your calories, exercising, and being in it for the long haul. Learn to eat right.

Fasting doesn't work and is a terrible idea.