MARIAH CAREY and NICK CANNON will be doubling their pleasure and doubling their fun with their new twins -- they've confirmed to Life & Style magazine that they're expecting a boy and a girl.

Mariah, who linked to the magazine's story from her Twitter page, tells the magazine, "Even before we announced it was twins, I was trying to keep everything gender neutral because I didn't want to impose an identity on them too soon. 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!"  The babies are due in April, according the magazine.

Meanwhile, Cannon tells People magazine that not only is Mariah packing on the

pregnancy pounds, but he is too.  He says that Mariah's been whipping up home-cooked meals every night, and they're all extremely fattening.  Nick told

People, "Last night we had smothered pork chops, collard greens, red beans and rice and a pecan pie with homemade whipped cream."  He adds, "She cooks it, tastes it, but instead of...eating it, I end up eating it. I think she craves it, but once she cooks it and smells it then the cravings go away."  (ABC)