New Delhi, Jan 04 (ANI): Jessica Simpson has confessed that she will be in the gym and dieting in order to lose more weight before her wedding. In a video promoting Weight Watchers' Simple Start program, the 33-year-old actress said that knowing she has the wedding coming up is an incentive to stay on Weight Watchers. Simpson, who has already chosen her wedding dress, said that everyone will know the difference when they see her dress.