Oprah Winfrey Invests in Weight Watchers

The media mogul, 61, bought 6.4 million shares of Weight Watchers, sending its stock skyrocketing.
2:22 | 10/20/15

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Transcript for Oprah Winfrey Invests in Weight Watchers
Okay, but in the meantime, ooh, it's good to be Oprah Winfrey. The power of Oprah. I don't even say her last name that much. That's why I stumble over it. The billionaire superstar betting big on weight watchers buying a stake in the business sending the stock skyrocketing. ABC's Mara schiavocampo has that story for us. Good morning, Mara. Reporter: Robin, good morning. Weight watchers is calling it a groundbreaking partnership. The media mogul joining the company as an owner, celebrity endorser and member this as the diet company is looking to expand from focusing just on weight loss to overall health and they're hoping the Oprah effect will help. This morning, Oprah Winfrey throwing her weight behind one of the world's biggest diet companies. How does it feel to lose weight while on weight watchers. Reporter: The media mogul buying 10% of weight watchers for $43.2 million. Tweeting "I believe in the weight watchers program so much I decided to invest." The announcement sending company's stock surging. Prices more than doubling Monday. Oprah is a super savvy businesswoman. She wouldn't have joined if she didn't think it was a solid investment. Reporter: As part of the deal Oprah will become a weight watchers member. Publicly sharing her own experiences after struggling with her weight for decades. Famously dragging 67 pounds of fat on stage for the "Oprah Winfrey show" in 1988. It is amazing to me that I can't lift it but I used to car I it around every day. When you see me gain weight it's not about me pigging out, it's always about my life is out of balance. It's not about the food. It's about using food. Reporter: This new partnership reflects weight watchers' efforts of rebranding and broaden the company's mission to bring or advertise overall health and wellness. In recent years their stocks have slumped as many dieters have gone digital now they're opening the Oprah effect can tip the scales. Now, Oprah will also take on a very important role as an adviser. One thing she knows how to do is inspire people to live their best life. As for that stock surge, the big winner, Oprah. She made $70 million yesterday. I'd say that's a pretty good day one. Yeah, sure was, Mara. That was one of those TV moments. Remember when she rolled out that wagon with all that fat. Remember it like it was yesterday.

This transcript has been automatically generated and may not be 100% accurate.

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