Mariah Carey Expecting a Boy ... AND a Girl!

Mariah Carey and Nick Cannon, who are expecting twins this spring, are having a boy and a girl, a source confirms. The best of both worlds, you could say!

The parents-to-be have been cautious about revealing too many details about the babies since the pair had a "long journey" to parenthood, Cannon said.

But he and Carey are preparing for the arrival of the twins' by "decorating and designing" the babies' nurseries – one in Los Angeles and one in NYC.

The parents-to-be are coming down the home stretch.

Meanwhile, Cannon says that his wife is in nesting mode, has been cooking up a storm and trying to stay active with daily swims. Stay healthy, Mariah!