Mariah Carey and Nick Cannon took a romantic stroll through the streets of Paris today and shared a sweet kiss before stepping inside Dior's baby boutique. The pair are overseas shopping for gifts for their twins, Roc and Roe, who turn 1 on Monday! It's a major milestone for "dem babies," Nick and Mariah's nickname for the twins, and their famous parents, who are also celebrating their four-year wedding anniversary. According to Mariah, it's going to be a special day for the family, and they've "put together some very festive plans." It looks like Roe and Roc will be well-dressed for the party and Nick and Mariah's vow renewal ceremony that's reportedly taking place later tonight near the Eiffel Tower.