worked. here's christie in 2013 and now one year later. will the weight loss continue for christie? not necessarily. after the first year, most patients stop losing weight and many actually gained weight. >> in general, by 12 sto 18 months we see maximum weight loss. typically what happens your energy intake and energy expenditure reach an e quill lib yam. >> in the end, the lap band isn't the magic bullet. it depends how much he exercises and what he chooses to eat and not to eat. elizabeth cohen, cnn reporting. >> all right. thank you so much for that. now to the jaw-dropping powerball jackpot. the sole winner remains a mystery still this morning. but we do know the winner bought