Inside Mariah Carey's Nursery!

Soon, Mariah Carey won't be the only one wailing high notes at home! Mariah and husband Nick Cannon give Life & Style an exclusive first peek at their newborns' breathtaking nurseries--one in their luxe Bel-Air, Calif., estate and the other at their NYC apartment! Both rooms are filled with comfy chairs, plush stuffed animals and the parents-to-be's personal touch!

"I wanted to create a beautiful, tranquil, cozy environment for the babies," Mariah tells Life & Style in an exclusive interview. "Everything matches, but pieces are individualized to celebrate the twins as separate entities."

Separate -- but equally glam! "Designing the LA nursery with Gail Sedigh of AFK Furniture and world-famous decorator Mario Buatta was so challenging because I had such specific ideas I wanted implemented. I feel like I'm bringing two individuals into the world, so I wanted to do more than cookie-cutter styles in blue and pink." And dad Nick agrees. He wanted the twins' side-by-side cribs accented with pink and green bedding instead of the traditional pink and blue.

Mariah's favorite part of the twins' LA nursery? The cloudscape, star-speckled ceiling. "The ceiling has orangey-pink clouds in a blue sky with golden stars twinkling. It's based on two songs I wrote that are fan favorites: 'Underneath the Stars' and 'Close My Eyes,'" Mariah tells Life & Style. "Sometimes I just sit in the nursery and stare at the ceiling because I love it so much. To me, it symbolizes wanting my children to dream as big as possible and to let their imaginations be unbridled." Mariah also incorporated her favorite winged insects, butterflies, into the nursery and super-soft stuffed-animal lambs, what the singer endearingly calls her fans.

Mariah has also been busy coordinating a nursery for the twins at her NYC apartment. "I prefer the East Coast schooling over the West Coast," Nick tells Life & Style. "But there are other things that come into play, like work."

While Mariah has enjoyed her pregnancy, she and Nick are certainly ready for the arrival of their son and daughter! "Being a mother is probably the hardest job in the world. I feel like, in a lot of ways, children come into the world to teach us," Mariah says. "It's going to be a delicate balance between raising them around glitz and glamour and keeping them grounded. One thing I'm sure of is that I'll be grateful for the twins every day, no matter what."

For the full gallery of photos inside Mariah's nurseries, pick up the new issue of Life & Style, on newsstands nationwide Friday!