If you want a sustainable diet, I'm definitely a fan of South Beach. It's a way to change your way of eating for good. Anything that involves drastically changing your food intake in a way that you don't plan to maintain is going to end up with you gaining back the weight you lost. It's also pretty dangerous to do a fast unless you can afford to take it easy for the whole time (driving a car is dangerous when you haven't eaten, for the record...I discovered this the hard way!)

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Most wanted jeans: Green Rainbows! 26/27
Also looking for Paige petite Robertson 27 & Ellis Island Lexie 26 on the cheap