Media mogul Oprah made some serious cash from just one tweet.

According to Market Watch, Winfrey racked up a whopping $12 million for merely writing about how she was able to lose weight and still eat bread.

Her post, a 30-second video clip published Wednesday, was to promote her journey with Weight Watchers, of which Winfrey is the largest individual stakeholder.

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"I lost 26 pounds, and I have eaten bread every single day," she said in her testimonial clip.

An hour after Winfrey sent her story into the Twitterverse, Weight Watchers shares climbed slightly over $2 a share, and since Winfrey owns roughly 6 million shares, the surge in share prices made the celeb $12 million, just like that.

Just because she made $12 million, however, doesn't mean she's got it already in her bank account. She'll get the money once she decides to sell her shares, which, judging by the way things are going, probably won't be any time soon.

In October, the television titan announced that she became a spokesperson for Weight Watchers just after she purchased 10 percent of the company's shares. Following in the footsteps of the brand's previous celebrity spokespeople — Jessica Simpson, Jennifer Hudson, Sarah Ferguson, Jenny McCarthy and Lynn Redgrave — Winfrey filmed a commercial to promote her partnership.

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The one-minute video shows Winfrey sitting in a chair and explaining why she joined Weight Watchers.

"Inside every overweight woman is a woman she knows she can be. Many times you look in the mirror and you don't even recognize your own self because you got lost — buried — in the weight that you carry. Nothing you've ever been through is wasted, so every time I tried and failed, every time I tried again, and every time I tried again, has brought me to this most powerful moment to say, 'If not now, when?'" said Winfrey, whose best friend Gayle King is also a member.

"I feel that way, and I know millions of other people feel that way. Are you ready? Let's do this together."

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