Weird Al Yankovic made this not me.

Sai decided he was going to look into this Christmas he has heard so much about. Actually he went to hear Christmas carols, and stalk the carolers. So after being caught by patrolling ANBU he decided to go to a music store and the song that came on was in his words, "The most sincere, heart melting song ever," but of course this is Sai.

"Its Christmas at blood hill
There's music in the air
The sleigh bells are ringing and the carolers are singing
While the mob sirens blare

Its Christmas at blood hill
The button has been pressed
The radio just let us know
That this is not a test

Everywhere the jutsu are dropping
Its the end of all humanity
No more time for last-minute shopping
Its time to face your final destiny

Its Christmas at blood hill
Theres panic in the crowd
We can dodge debris while we trim the tree
Underneath the gore-stained cloud

You might hear some ninja on your rooftop
Or Haku on your windowsill
But if someones climbing down your chimney
You better aim your senbon and shoot to kill

Its Christmas at blood hill
And if the chakra levels okay
Ill go out with you and see all the new
Demon on new years day

Its Christmas at blood hill
Just seconds left to go
Ill duck and cover with my yuletide lover
Underneath the mistletoe

Its Christmas at ground zero
Now the missiles are on their way
What a crazy fluke, were gonna get juked
On this jolly holiday,"

Now after he heard this song he bought the rights and the sheet music, so he could start drawing a Christmas card to the hag.