Oprah Winfrey was hospitalized for “some kind of stomach thing,” her best friend, Gayle King, revealed on Tuesday.Winfrey, 70, was supposed to drop by King’s “CBS Mornings,” but skipped out on the appearance due to being under the weather.“She had some kind of stomach thing — stomach flu — stuff was coming out of both ends,” the news anchor, 69, explained.“I won’t get too graphic. Needless to say, she ended up in the hospital, dehydration, had to get an IV, it was a very serious thing.”A spokesperson for Winfrey told Page Six that the billionaire “is recovering following a stomach flu and received an IV due to dehydration at the recommendation of her doctor.”“She is resting and feeling better every day,” the statement concluded.Winfrey had planned to introduce author David Wroblewski and his book, “Familiaris,” which is the latest pick for her book club.“I wanted to make it clear that [the book] matters to her and it really bothered her that she couldn’t be here today.