http://quickweightloss.net/ is a website you could try out. It features some things about losing weight fast. Another online source is http://www.momswhothink.com/lose-weight-fast/how-to-lose-weight-fast.html . This site features different diets you could choose from.
The diet plan I have heard the most about is called the Atkins Diet. The Atkins diet cuts out carbohydrates mainly, so it works well. www.atkins.com
The Atkins diet can cause rapid weight loss in the first fortnight if the individual restricts their intake of carbohydrates to below 20g a day. The Dukan diet can also lead to quick weight loss.
Was a dietition involved in vegan diet
I always recommend a diabetic exchange diet plan coupled with walking or other low-impact aerobic exercise for quick and sensible weight loss.
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This is a a subjective question, but I would say that the best diet plan for quick and long lasting weight loss would be a low calorie, low fat, high fiber diet of around 1800 calories a day, depending on your weight and your desired weight.
I have tried all kinds of diet plans for quick weight loss and find the Slim Fast program works well and fast. You should be able to lose 3-4 pounds per week on their program.
Forget it! You'll gain the weight back quicker than you put it on!
Eat proper diet. do exercise regularly and try to do swimming because swimming is the quickest way to loss weight.
Weight loss is best achieved when you have a diet that works FOR YOU. You do have to put some effort in, though. Counting calories, being the most important and basic. Check the link in my bio for some tips on dieting.
http://tummytuckprocedure.net/quick-weight-loss-diet-plan-you-lose-weight-for-your-health/ has a very helpful video about the tummy tuck, and diet plans for it.
I would suggest that you don't undergo any sort of diet plan. 100 pounds isn't overweight, and any sort of quick weight loss plan may end up being harmful to you.