It’s that time of the year again! How can you not love Jimmy Fallon, let alone Jimmy Fallon together with Mariah Carey? The charismatic late-night TV Personality invited Mariah Carey on his Show to perform together with The Roots, a lo-fi version of All I Want for Christmas is You. Kids. Xyolophone. Recorder. Banjo. Hand Drums. And is that a Hair Pick I see? So absolutely charming! These Fallon Videos are guaranteed to be an American Cultural Institution.