20. Kirstie Alley
Do you remember those Jenny Craig weight-loss commercials? Kirstie Alley rose to popularity with those commercials. After battling with her weight for over 20 years, this comedian/actress managed to lose as much as 75 lbs from 2004 ot 2007. However, she again put on an extra 83 lbs after leaving Jenny Craig. Then by 2011 Kirstie had lost a massive 100 lbs. Alley has been keeping her weight steady every since, and has found her way back into Jenny Craig as its spokesperson.