Mariah Carey is opening up about her pregnancy -- telling Ellen DeGeneres it feels like "a constant 'ugh'" and she gets "a little nauseous."

In an interview airing today, Mariah also plays it coy when asked if Ellen can guess the sex of her baby.

"I would prefer not," says Carey, "Because imagine if you're a baby inside someone's body. Do you really want someone imposing their sex ideas on you?"

She continues, "I'm not going to impose pink on a girl. Do you think I'm really going to go that hard with it? That's how you get the exact opposite."

Carey adds that the room for the baby is "gender neutral."

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