I don't know, I heard about a way to lose sizes with lemon juice and maple syrup, but in that "diet" you should just drink them for a week and when you restart to eat normally, you get the weight you lost.
Lemon just helps to lose water retention. Then it has fructose, a kind of sugar, so it isn't without any calorie.
Drinking a lot of water (not so much in a short time, you can even die!) and putting chili everywhere you can (in the food, I mean) helps a lot. If you drink a glass of water before eating a meal, you'll save 75 kcal.
I used to have cold showers: cold water and ice helps to burn fat a lot. If you want to lose water retention and cellulitis, you should have a hot bath with coarse salt.