*First Tab*

Justin Bieber ft. Boyz II Men (Fa La La)
(Capo 3rd)
5 simple chords:
Am7 - 002010
Em7 - 022033
A7 - 002020
F7 - 003210
G - 320033

(D= Down, U= Up, X= Chuck/Slap/Hit)
Strumming Pattern: DUXDUX 
Am7 - DUXDUX
Em7 - DUX
A7 - DUX
F7 - DUXDUX
G - DUXDUX

Am7                               Em7
This is the time of year we can give it,
A7                            
Give it, give it, give it all
F7                                          G
One through ten on you're list you can get it,
                           
Get it, get it, get it now
Am7                    Em7
Make you're wish tonight
A7                       F7
When you open you're eyes

When the lights go bright girl
G
I'll be right there

Baby you deserve everything you want
It's your night, ohhh
Wanna put my ear to your chest girl
Baby I hear melodies when your heart beats
Baby it sings to me like
Fa la la la la, fa la la la la
Baby I hear melodies when your heart beats
Baby it sings to me like
(Fa la la la la, fa la la la la)
I know that it's christmas time

.....

Am7                           Em7      A7
I'll deck you're heart with bells of holly (bells of holly)
F7                   G                     
Fa la la la la la la, fa la la la la la la...
Am7                          Em7        A7
Baby cause you're the reason to be, jolly
F7                    G
Fa la la la la la la, la la la la la la la...

(Note: For this part the "F7" chord, you will need to put your pinkie on bottom 
6th string on third fret, so it should be 003213)

If you liked it pleases Rate! and if you still need help I will be posting a 
tutorial video up shortly :)