Starting a new diet with a friend

The Alice Diet is going to be my saving grace. Its supposed to help you lose 15 to 30 pounds if you stick to the diet like white on rice. Its 22 days and consists of a one day fast period the consumption of tea, and 500 calories or less depending on the day. I need to lose twenty pounds by the end of the summer and this seems as though it will take me above and beyond what I need to be.