I know it's a lot to lose fast, but that's how it works, and it's the only diet I have EVER not cheated on.
It's HCG - I do injections of the hormone and eat 500 calories a day and am surprisingly not hungry.
It's the Dr. Simeon's protocol based on his book "Pounds and Inches" If you do a search online for his name, a LOT of stuff will probably come up.