Janet Jackson has been candid about her lifelong struggle with weight, but — as you can see in this new photo from her Nutrisystem ad campaign — she appears to be winning the battle. The 45-year-old singer, whose weight has yo-yoed up and down during her long career — debuts her much trimmer figure in a curve-hugging orange dress. In a new commercial for the weight loss company, which debuted yesterday, Jackson shows off her "after" body in form-fitting black pants and a white top, declaring,...