mariahcareyboygirltwins.jpg We knew Mariah Carey was expecting twins, but a new report claims she'll be painting her nursery blue and pink, because she's having a boy and a girl!

“It’s truly going to be a dream come true for them," a friend of the couple told Life & Style. "They get a son and daughter.”

Mariah herself chimed in, “There were fan contests on Twitter about what gender they are and rumors about them being two boys or two girls -- but nobody guessed this!"

Mariah and hubby Nick Cannon are expecting their twin bundles of joy next April. “It’s been a long journey," says Mariah. "But a happy one.”