Dem babies sure turned one in high style!

To celebrate their twins' first birthday Monday, Mariah Carey and Nick Cannon pulled out all the stops -- in Paris.

PHOTOS: Mariah and Nick's love story

Marking the occasion on Sunday with pink and blue balloons, custom-made French pastries, confetti and lots of toys, Carey, 42, and Cannon, 31, had a ball toasting Moroccan and Monroe alongside several close friends at the Plaza Athenee.

PHOTOS: Mariah and Nick and other couples who've struggled to conceive

In addition to the twins' special day, mom Carey and dad Cannon did a little celebrating while in Paris this week. On Friday, the duo marked their fourth wedding anniversary with a vow renewal ceremony in the City of Light.

PHOTOS: What Mariah wore to her vow renewal

Saying "I do" all over again has become an annual event for the couple.

"I have to do it every single year," Cannon has explained to Us Weekly of the renewals. "If you were married to Mariah Carey, you'd want to marry her every year too! I just have to keep doing it to make sure it's real."

This article originally appeared on PIC: Mariah Carey, Nick Cannon's Twins Celebrate 1st Birthday in Paris