Marie Osmond: Nutrisystem Cougar?!

Marie Osmond is thinking thin for the holidays! We're with the busy entertainer behind the scenes of her brand-new commercial for Nutrisystem -- and you'll never guess what her daughter calls her!

"My daughter, who's 20, she called me a cougar," says Marie with a laugh. "I thought that was pretty funny. She said to me, 'Mom, looking at you now: I'm going to grow up and be a cougar!'"

Marie has lost 50 pounds on Nutrisystem and has kept it off, regularly eating the weight-loss program's food to maintain her spectacular shape.