Keeping Up with Kirstie

As part of her program, Kirstie signed up 10 friends to lose weight with her. Holding each other accountable and having a little healthy competition worked wonders—Kirstie's sister Collette lost 75 pounds and her friend Robin lost 60!

"We just were big fat girls who all were friends or sisters," Kirstie says. "Fat attracts fat," Oprah points out. "It must," Kirstie agrees. "But now skinny attracts skinny!"