Mariah Carey rang in her 49th birthday (or "anniversary," as she likes to call it) on Wednesday, and her party was filled with lots of love and one hilarious surprise. The singer shared photos and videos from her pink- and purple-themed bash on Instagram, including one that shows her 7-year-old twins, Monroe and Moroccan Cannon (whom she parents with ex-husband Nick Cannon) spraying her with silly string. "You hate me!" Mariah jokingly screams as everyone yells, "We love you!" Mariah is currently in the midst of her Caution World Tour, but we're glad she made time to celebrate her "anniversary." Happy birthday, Mimi!