(Intro)
E|------------------------------------------------------------------|
B|------------------------------------------------------------------|
G|------------------------------------------------------------------| x2
D|------------------------------------------------------------------|
A|---3-0--0--0--3-0-3-0--0--0--3-0-3-0--0--0--3-0-3-0---0-3-0-3/5---|
E|----------------------------------------------------3-------------|
p.m.

Merry Christmas...
E|----------------------------------------------------------------|
B|----------------------------------------------------------------|
G|---5-0--0--0--5-0-5-0--0--0--5-0-5-0--0--0--5-0-5-0---0-5-0-5/7-|
D|---5-0--0--0--5-0-5-0--0--0--5-0-5-0--0--0--5-0-5-0-5-0-5-0-5/7-|
A|---3-0--0--0--3-0-3-0--0--0--3-0-3-0--0--0--3-0-3-0-5-0-3-0-3/5-|
E|----------------------------------------------------3-----------|

E|---------------------------------------------------|
B|---------------------------------------------------|
G|---5-0--0--0--5-0-5-0--0--0--5-0-5-5-5-5-----------|
D|---5-0--0--0--5-0-5-0--0--0--5-0-5-5-5-5-5-5-5-6---|
A|---3-0--0--0--3-0-3-0--0--0--3-0-3-3-3-3-5-5-5-6---|
E|-----------------------------------------3-3-3-4---|

In a part of the song the guitar on the background sounds a few notes higher. I think 
you have to lower of 1 string (For example: the 2nd string become the 1st). I tested it 
and looks good.

AND THE OTHER TAB:

(Intro)
E|------------------------------------------------------------------|
B|------------------------------------------------------------------|
G|------------------------------------------------------------------| x2
D|------------------------------------------------------------------|
A|---3-0--0--0--3-0-3-0--0--0--3-0-3-0--0--0--3-0-3-0---0-3-0-3/5---|
E|----------------------------------------------------3-------------|
p.m.

Merry Christmas...
E|----------------------------------------------------------------|
B|----------------------------------------------------------------|
G|----------------------------------------------------------------|
D|---5-0--0--0--5-0-5-0--0--0--5-0-5-0--0--0--5-0-5-0---0-5-0-5/7-|
A|---3-0--0--0--3-0-3-0--0--0--3-0-3-0--0--0--3-0-3-0-5-0-3-0-3/5-|
E|----------------------------------------------------3-----------|

E|---------------------------------------------------|
B|---------------------------------------------------|
G|---------------------------------------------------|
D|---5-0--0--0--5-0-5-0--0--0--5-0-5-5-5-5-----------|
A|---3-0--0--0--3-0-3-0--0--0--3-0-3-3-3-3-5-5-5-6---|
E|-----------------------------------------3-3-3-4---|