Jennifer Hudson loses it

Jennifer Hudson shows off her new weight-loss body at the Glass Houses on in New York City. The 28-year-old singer and mother of 7-month-old David Otunga is part of a new advertising campaign with Weight Watchers.

"After I had the baby, I made up my mind that I wanted to go in a different direction and find a better lifestyle and a better way," Jennifer told Good Morning America. "So I set my mind to this challenge and I went after it. I feel like I've conquered the world."