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#RichKids of Beverly Hills star E.J. Johnson lost 50 pounds in five weeks after undergoing gastric sleeve surgery. In September, he told People he is not setting a specific number in terms of his goal for weight loss.

"The View's" Whoopi Goldberg, left, and Rosie O'Donnell, right, share their weight-loss news on the show's season premiere. Goldberg has lost 35 pounds, and O'Donnell, inspired to take action after a heart attack two years ago, has lost more than 50. Nicolle Wallace, second from left, and Rosie Perez are new co-hosts on the show.

On April 15, Dave Chappelle was spotted leaving Live Nation's offices in Los Angeles carrying some extra muscle. Apparently, the comedian has been spending his free time in the gym.

Roseanne Barr recently showed off a slimmer figure at the 2014 NBCUniversal Summer Press Day in Pasadena, California. The 61-year-old has been delighted by all the attention fans have paid to her new figure and thanked them via Twitter.

Lorraine Bracco of "The Sopranos" has lost 35 pounds since the HBO drama's end in 2007. She said it was the death of her parents three years ago that inspired her to make a change. Before their death, she remembers "sitting there, dividing these medications, who gets what when," she told ABC News. "It was insane. I watched and realized, 'I don't want to go like that.' ... I want to live every day the best I can be."

At 46, Lisa Marie Presley is feeling 16 again. Eating clean and organic has helped her to reach "the weight I was at when I was a teenager," she told People magazine. Presley, the daughter of Elvis Presley, was inspired to get fit because of her father's family history of shorter life spans. "I didn't know where I would land," she said. "So I said, 'OK, I'm going to play it safe and try to be as healthy as I can be.' "

Tom Arnold has lost about 90 pounds since his first child was born last year, and he was looking quite thin at this year's South by Southwest festival. He'd actually lost the same amount of weight before but regained it when he didn't maintain healthier habits. After his son was born, he knew he needed to make a lasting change. "I saw that little baby, and I thought, 'I gotta stay alive for as long as possible,' " Arnold said in January. "That's a lifelong commitment."

Jessica Simpson shows off a supersvelte look in a Weight Watchers ad released in February. "I was so insecure -- I couldn't even believe what I weighed," Simpson told "Good Morning America." The singer/fashion mogul says she is feeling better than ever since giving birth to her second child in June.

Christina Aguilera turned heads on the American Music Awards' red carpet for two years in a row. At the awards ceremony in 2013, Aguilera surprised onlookers by arriving in a skin-tight white gown with revealing cutouts, displaying a much different look than her voluptuous appearance at the 2012 event.

At the 2013 CMA Awards, singer Miranda Lambert revealed a slimmer physique. Apparently, her fit frame is courtesy of personal trainer Bill Crutchfield: "Hey @CrutchCamp," Lambert tweeted November 7. "I got some compliments last night thanks to you!"

Chaz Bono told People in April 2013 that he had lost 60 pounds since appearing on season 13 of "Dancing With the Stars." "Diets don't work," he told the magazine. "You just have to change what you eat, and I have." Bono is pictured arriving at the GLAAD Media Awards in April 2010, left, and in April 2013.

There's no way Marissa Jaret Winokur could play "Hairspray's" zaftig Tracy Turnblad these days. The Tony-award winning actress dropped 60 pounds in 2012.

Jennie Garth slimmed down after splitting with husband Peter Facinelli in 2012.

Lisa Lampanelli said she underwent surgery to help her shed 80 pounds and give her a new look.

From thong to thin: Matthew McConaughey reportedly dropped 40 pounds for a role in "The Dallas Buyers Club," and the transformation was startling on the "Magic Mike" star.

Paula Deen announced in June 2012 that she lost 30 pounds over a six-month period after she was diagnosed with Type 2 diabetes. These days, she is looking slimmer than ever.

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(CNN) -- Fans of the E! reality series "#RichKids of Beverly Hills" will be seeing a lot less on one of its stars.

E.J. Johnson has shed 50 pounds after undergoing gastric sleeve surgery. The 22-year-old son of basketball great Magic Johnson told People "[Weight] is something that I've been struggling with for pretty much all of my life" and that he had tried a variety of diets.

"Nothing was working, and I wanted to make a more permanent decision to get back on track," he said. "[But] I wanted to wait until I was a little bit older to know how to handle myself afterwards."

Johnson said he has cut out foods with a lot of sugar as well as alcohol, bread and anything fried. Dance and Pilates classes four to five days a week as well as watching his diet has helped him trim his 6-foot-2 frame.

Johnson said he is basing his goal on getting to the point of looking like he wants, and he hopes to hit that ideal in a year.

"Being able to take control of my life again, take control of what I'm eating and my fitness is enlightening and empowering," he said.

Fitness trainer gains and loses 70 pounds in 1 year on purpose