All we want for Christmas … is Mariah Carey! The undisputed Queen of Christmas and best-selling female artist of all time with over 200 million records sold, Mariah Carey, is decking the halls of Las Vegas with her glittering holiday spectacular, “Mariah Carey’s Christmastime in Las Vegas,” at Dolby Live at Park MGM. The festive run of 10 magical performances will take place from November 28 through December 13, transforming the Strip into a winter wonderland filled with holiday hits, sparkle and Carey’s legendary vocals.