In 1994, Mariah Carey‘s 'Merry Christmas,' which contains her “All I Want For Christmas Is You,” helped revitalize the contemporary pop holiday release, and its enduring popularity helped set a new standard for the modern Christmas album.⁠ ⁠ By the turn of the century, recording a holiday album became a rite of passage for almost every burgeoning pop star, with some releasing more than one over the course of their careers. ⁠ ⁠ Both #TaylorSwift and #JustinBieber were just 17 when they released their first holiday collections, 'The Taylor Swift Holiday Collection' and 'Under the Mistletoe,' respectively, while #Pentatonix dropped six holiday albums in a decade.⁠ ⁠ To celebrate “the most wonderful time of the year,” Billboard is taking a look back and tallying up the 21 best #Christmas albums of the 21st century (so far) at the link in bio.