(CNN)"Mariah Carey's Magical Christmas Special" is set to debut globally next month and her impressive guest list keeps growing.The "All I Want For Christmas Is You" singer has invited a line-up of superstars, including Ariana Grande, Jennifer Hudson, Tiffany Haddish, Billy Eichner, Snoop Dogg, Jermaine Dupri, Misty Copeland and Mykal-Michelle Harris to take part.