Mariah Carey knew all along that she was going to wed Nick Cannon, says pal Oprah Winfrey.

Before she tied the knot, Winfrey said that Carey had the words "Mrs. Cannon" tattooed on her back.

Winfrey dished about the shocking wedding on her talk show Wednesday.

Her pal Gayle King also appeared, via satellite, and recalled an interview she had with Carey a week before the April 30 ceremony.

King said that Carey told her, "I do have somebody, but I can't tell you who it is." When pressed, Carey finally admitted, "It is Nick Cannon. It's a secret. Don't tell anybody."

King said she thought even Carey herself didn't even know she'd be getting married so fast.

Not so, says Winfrey.

Before wedding, Carey visited Winfrey and "she already had, on her body, the tattoo on her back that said 'Mrs. Cannon,'" Winfrey said. "They were already planning on doing it."

King, who has spoken to Carey, then added, "Mariah told me herself that she has never felt this way about anybody before in her whole life. They have something special between the two of them that both of them feel.

King said she is "concerned they got married so quickly. I do think when you meet somebody you've only known a month ... that's a little scary."

Still, King added, "I'm happy for her."