Oprah eats bread, loses weight, makes $12.5 million

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Oprah to buy 10% stake in Weight Watchers

Claman on Call: FBN’s Liz Claman with an after-hours web exclusive on the markets, Weight Watchers stock and upcoming corporate earnings.

Oprah Winfrey's loss is also her gain.

On Tuesday, the 61-year-old icon tweeted out a video to her 30 million followers proclaiming that she has eaten bread "every single day" on her Weight Watchers diet and has still lost 26 pounds.

Following Oprah's carb confession, Weight Watchers stock went up 20 percent, closing at $13.29 a share. Seeing as she owns 10 percent of the company, Oprah earned $12.5 million dollars, or roughly $3 million an hour.

USA Today points out that if you factor in her 3.5 million Weight Watchers stock option, she made a staggering $19.2 million, or nearly $5 million an hour, after her single tweet.

WATCH: Oprah's Powerful Weight Watchers Commercial Is Bringing People to Tears

Oprah joined forces with the diet brand in October and immediately caused their stock to sky rocket. Once news broke of Weight Watchers' partnership with the Queen of Talk, the company's stock went up 53 percent in pre-market trading to $10.36. According to a Securities and Exchange Commission filing obtained by USA Today, Oprah purchased her shares at $6.79 for a total investment of $43.2 million.

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"Weight Watchers has given me the tools to begin to make the lasting shift that I and so many of us who are struggling with weight have longed for,” she said in a statement at the time. "I believe in the program so much I decided to invest in the company and partner in its evolution."

WATCH: Kim Kardashian Is Down 30 Pounds Since Giving Birth to Saint West, Wants to Lose 40 More

While Oprah is all about Weight Watchers, other stars -- including Jessica Alba and Allison Williams -- are really into Kayla Itsines' 30-minute workout. ET sat down with the 24-year-old trainer to reveal her secret behind her fitness regimen.