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Dem babies are growing up fast!

2011 was indeed a big year for Mariah Carey and Nick Cannon, who welcomed twins Moroccan and Monroe, now 8 months, in April after a lengthy struggle to conceive.

Now, as the year draws to a close, the couple is highlighting their kids' first year with a series of new holiday-themed photos, posted on their family's photo album website,

In one snapshot, captioned "Monroe & Moroccan's First Christmas," Carey, 41, and her daughter pose with Santa Claus, while Moroccan (nicknamed "Roc") is all smiles in a pumpkin outfit.

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"My family gives me everything," Cannon, 31, told Barbara Walters in an interview earlier this year. "Unconditional love means...the world to me. I mean, it's completion."

"It's just love," added Carey. "It's a beautiful place to be."