That's quite impossible! Some might even say preposterous. Being a nutritionist I know for a fact that one cannot lose any weight in a single day. I usually prescribe a strict and regimental diet for my clients and they are advised to follow this diet for a period of at least three months. Visible changes in the body can be witnessed during this period, but nothing is going to happen in one day. A liposuction procedure is the only viable option but it is not natural and it can be quite painful. But you can lose more than 10 kilos in a single liposuction procedure.