Don't YOU wanna feel good today?

:: youtube :: 

Well JIMMY FALLON never dissappoints on that end. Using instruments you would find in a preschool classroom, Jimmy Fallon and his band "The Roots" played "All I Want for Christmas Is You" WITH MARIAH CAREY AND ADORABLE CHILDREN

What's not to love about this in the Christmas season?

Content provided by Jenny Haining, American University 2013