Janet Jackson Janet Jackson

Janet Jackson has slimmed down and is showing it off.

Photo Gallery: Dramatic celebrity weight loss

The singer, a self-professed "emotional eater" who's been a yo-yo dieter for years, signed on as a spokeswoman for the Nutrisystem diet program in December and is flaunting her svelte new bod in an ad that debuted Monday."I lost the pounds I wanted to lose and you can too. This is what success looks like," Jackson says in the clip while wearing a white shirt, black pants and a belt highlighting her thin waist. In a print ad, Jackson, 45, is clad in a form-fitting orange dress and sky-high pumps.

Perez Hilton reveals shocking weight loss, shows off six-packJackson, who is 5-foot-4, doesn't reveal how much weight she's lost, but Nutrisystem said in December that she had shed 10 pounds after a month. "I'm not viewing this as a diet," she said then. "I'm not putting a number on it. I don't look at the scale. I'm going about it in a different way this time."Watch the ad below. What do you think of Janet's new body?