Blaine: 

It came into my dreams last night 
great big man in red and white 
He told me that it's gonna be 
special year for you and me 

Underneath the mistletoe 
Hold me tight and kiss me slow 
The snow is high 
 [bad word] inside 
I wanna hear you say to me 

Rachel with Blaine: 

It's a very, very, merry, merry Christmas 
Gonna party on 'till Santa grants my wishes 
Got my halo on, I know what I want 
It's who I'm with 
It's an extraordinary merry Christmas 

Blaine and Rachel: 

It [bad word] as a surprise 
Who's been naughty, who's been nice 
There's someone here for everyone 
Another year has just begun 

Silent night, none in sight 
Sleigh bells ring until the light 
Hearts explode, here we go 
It's all right there inside your eyes 

Rachel with Blaine: 

It's a very, very, merry, merry Christmas (This Christmas will be better than the one before) 
Gonna party on 'till Santa grants my wishes (Someone is gonna be knocking on my door) 
Got my halo on, I know what I want 
It's who I'm with (It's Christmas time) 
It's an extraordinary merry Christmas 

Blaine with Rachel: 

Won't you meet me by the tree? 
Slip away so secretly 
Can't you see how this could be? 
The greatest gift of all 

Rachel with Blaine: 

It's a very, very, merry, merry Christmas (This Christmas will be better than the one before) 
Gonna stay with you 'till Santa grants my wishes (Someone is gonna be knocking on my door) 
Got my halo on, I know what I want (It's Christmas time) 
It's who I'm with 
It's an extraordinary merry, very, very, merry, merry Christmas (This Christmas will be better than the one before) 

Gonna party on 'till Santa grants my wishes (Someone is gonna be knocking on my door) 

Got my halo on, I know what I want 

It's who I'm with (It's Christmas time) 

It's an extraordinary merry Christmas (This Christmas will be better than the one before) 

It's a very, very, merry, merry Christmas (This Christmas will be better than the one before) 

It's an extraordinary merry Christmas