Rob Kardashian revealed that he wanted to lose 40 pounds earlier this week, and while his weight loss has been minimal so far, he has a slew of others to look up to in Hollywood -- including older sister Khloe Kardashian, who shed 20 pounds in just 20 days last July.
The reality star siblings aren't the only people who have publicly battled with their weight, of course. Check out other celebrities, from America Ferrera to Rihanna to Raven Symone, who have slimmed down over the years and have kept the weight off, in our gallery below.