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Steve Erle

For her 36th birthday, Christina Aguilera refused to act her age. “I wanted to let grown-ups experience the joy of being a kid again,” the mom of Max, 8, and Summer, 2, tells Us. On December 10, eight days ahead of her big day, the Voice alum and her fiancé, Matthew Rutler, 31, transformed their $10 million Beverly Hills spread into a pink Christmas Candyland with confection-festooned trees, inflatable slides and a Hello Kitty bounce house. The singer shares the photos exclusively with Us