Of her latest dietary flop, she wrote, "I definitely wasn't setting an example. I was talking the talk, but I wasn't walking the walk. And that was very disappointing to me."
With weeks before President-elect Obama's historic presidency begins, Winfrey says she still wonders what she'll wear to the inaugural ball.
"I had a dress on the vision board, but I'm not sure that's going to fit," she said. "So I have to work on something else."
The reaction to the announcement of O Magazine's January issue has already been "really huge," King said.
Winfrey isn't the only voluptuous celebrity who has given up on the idea of being slim, but is continuing to do some form of dieting.
Queen Latifah signed on as a spokeswoman for Jenny Craig earlier this year. But she said she had no plans to shrink her plus-size image.
Instead, Latifah said she would be satisfied to lose 5 percent to 10 percent of her body fat but expected to cut down on her chances of disease and living a healthier life.
Former supermodel Tyra Banks is hardly in the same class as Winfrey and Latifah but she admitted on her show that she had packed on 30 pounds since her catwalk days had ended. And she's not embarrassed about it at all, she says.