Note to singers, like those in the 42 versions I listened to and discarded before posting this one: When it's a Christmas carol, that is who the star of the piece is.
Stop jazzing, soloing, and tarting it up, which is just the petty talent's cry of "Me! Me! Me!"
Your own skills and talents show best when you focus on the music, with as much artistic perfection as you can muster, and not on inserting your own flourishes.
Tomorrow, a case in point of how that works.