Last night, December 20, Ariana Grande returned to Studio 8H to host Saturday Night Live for the second time in as many years. During her monologue, Grande parodied Mariah Carey ’s recently record-breaking “All I Want for Christmas Is You” and was joined by Bowen Yang, who is leaving the SNL cast midway through his eighth season. She also appeared in sketches throughout the evening as an Elf on the Shelf, a dance instructor, and Macaulay Culkin’s Kevin McCallister from Home Alone . In the “