Mariah Carey was truly living her best life and brought in the new Year right. She recently celebrated a milestone. Her Christmas classic, "All I Want for Christmas Is You," made her the first artist to ever hit No. 1 on the Billboard Hot 100 chart in four separate decades. Mariah and her family hit the Dominican Republic for the New Year and the mansion they rented out was gorgeous.The mansion had its own private beach, 9 bedrooms and was fully staffed. We are glad to see her enjoying the holidays.