Kathy

16 of 21
Kathy
Kathy didn't have as much weight to lose as some of the other women, but she actually added 10 years to her life by quitting smoking. "Quitting isn't hard—staying stopped is the problem," she says. "It's still a struggle every once in a while, but it was part of this [challenge], and I think it was really the motivation I needed."

On Kathy: Suzi Chin for Maggy Boutique dress ($148), Glint "Kathryn" sandal ($109.95) from Nordstrom