Why so desperate to lose weight? Are you so over-weight that you are going to die within the next few months? Being sexy is more than being YOUR ideal weight. ("The" ideal weight doesn't exist, everyones opinion is different. And skinny can be from 70lbs to 150lbs, or even more)
If you have a couple of months, and only want to lose a few pounds, my advice is to eat right, and exercise. Typical, yes, but it works. Maybe throw some weight training in there. Muscle burns fat :P. However, if you go on a diet, do not go on a "fad" diet. If it's advertised on tv, it probably doesn't work.
Cheers
Hazank