Credit: George Pimentel/

Oprah Winfrey is shooting down those lesbian rumors once and for all.

In an upcoming Barbara Walters special, Winfrey, 56, declares, "I'm not a lesbian. I'm not even kind of a lesbian."

The chatter annoys her, she says.

"The reason why it irritates me is because it means that somebody must think I'm lying. That's number one," Winfrey says. "Number two ... why would you want to hide it? That is not the way I run my life."

One major reason for those false rumors, of course, has been Winfrey's close friendship with Gayle King. Winfrey gets tearful once Walters brings King up.

"She is ... the mother I never had. She is ... the sister everybody would want. She is the friend that everybody deserves. I don't know a better person. I don't know a better person," Oprah says emotionally.

"It's making me cry because I'm thinking about ... how much ... I probably have never told her that. Tissue please. I now need tissue. I've never told her that."