Tia Carrere, best known for her role in the '90s film Wayne's Wolrld, joined the cast shortly after giving birth to her daughter, Bianca. She saw the competition as a healthy way of getting her figure back after pregnancy, and said the grueling practice schedule had her "dancing for hours, hours and hours." "I don't need to look like a lingerie model coming out of the box," Carrere said. "I'll take the time and do it the right way."

'N Sync singer Joey Fatone lost more than 20 pounds during his time on Dancing. He prepped for the gig by cleaning up his eating habits with the help of food delivery service NutriSystem, but he kicked things into high gear once he started rehearsing. "When I started dancing with Kym, the weight really started coming off," he said. "I was 235 pounds when I started. Now I'm 216. It's pretty cool to see my stomach get smaller."

Marie Osmond is yet another stellar example of the show's weight-loss success stories. "I'm down 31 pounds so far. I've lost about five inches off my hips and five inches off my waist," Osmond told OK!. "I've added muscle mass and I am much more toned. It's incredible. The show should be called 'Dancing With the Starved'!"

The 61-year-old actress credits the show with her 22-pound weight loss, but slimming down wasn't the only benefit for Seymour, who suffered from three herniated discs. "I used to be three days a week in physiotherapy and, thanks to ballroom dancing, I now have full mobility. (It's) absolutely amazing," she told StarPulse.

Apple co-founder Steve Wozniak says he lost about 40 pounds while competing on Dancing. One of the biggest perks of his slimmer physique? "I can sit in a booth in a restaurant now," he told OK! after being eliminated. "When you exercise, you don't eat as much, either, because you just don't want as much food."

Kelly Osbourne, who has notoriously struggled with her weight for years, received an entirely new perspective on nutrition thanks to her dance partner, Louis van Amstel. The Fashion Police co-host attributes a "high-protein, low-carb diet" to her 20-pound weight loss while on the show. Van Amstel introduced her to healthier options like turkey burgers and salads, and confessed to Shape, "It's true what they say: Diet and exercise really work!"

Dance pro Louis Van Amstel was also influential in helping comedian Margaret Cho shed some serious pounds. Cho told People the healthier lifestyle was something she considered a "permanent" change. "I told him after this, I'm staying physically active," she said. "I've never been physically active in my life, and I know that Louis has added years to my life, and this is a really important thing. I want to stay in my body, I want to stay in my skin."

All of the hours spent prepping for the competition certainly paid off for Disney Channel star Kyle Massey. His partner Lacey Schwimmer told

Alley is perhaps Dancing's biggest loser, as the diet and exercise routine she used on the show ultimately led to her losing 100 pounds!. ""I feel like I'm back in my element," she told Entertainment Tonight. "I honestly didn't even realize what I looked like. … Before Dancing with the Stars, I bought these dresses from size 14 to 4. And I said, 'You know what I really want? I really wanna be in this dress in a 4!'"

Chaz Bono noticed that the "dancing" part of Dancing With the Stars became noticeably easier once he added more muscle to his frame. "I have definitely noticed a change [in my body]… I'm feeling great," Bono in an Us Weekly interview.

Even though CNN correspondent Nancy Grace believes "women should love their bodies like they are," she was still thrilled about getting into better shape as a result of the show."This has been a great side effect to dancing, so I'm happy," she told People.

Despite his affinity for fast food that viewers witnessed on Keeping Up With the Kardashians, the reality star turned to the healthy meal delivery service Z.E.N. Foods during his time on Dancing. "That's about all I stick to… It's really gotten me through my rehearsals," he told The Insider.

Ricki Lake noticed her body getting trimmer each week during costume fittings. "I've lost 12 inches in three weeks," she told Access Hollywood. "I'm putting in the work. I'm getting a lot of sleep. Everything is on the backburner right now. Dancing is my priority." Halfway through the competition, Lake had shed so much weight, her older clothes no longer fit. "All my jeans are falling off," she said. "I was a size 8 when I started this thing, now my size 6s are big."

Dancing pro Tristan MacManus gave singer Gladys Knight a run for her money in the ballroom, which contributed to her dropping several pounds during the show. "[Tristan] helped [by] wearing me out," Knight told People. But her clean diet was another major factor in Knight's slim-down. "You've got to eat healthy and you've got to put a little movement into it," she says.

For Sherri Shepherd, the weight loss from Dancing With the Stars was nothing compared to feeling healthy in general. The View co-host told Access Hollywood, "I wake up with a lot of energy and I feel like I can play with my son without breathing hard." She also compared the exercise regimen to "a great form of Pilates." "I've never felt better in my life," she said.