Should be pretty easy to play. In the song it sounds like there may be a second guitar. 
the G string when you strum the 4th fret, it is supposed to be the sound of the 2nd 
Hope it works out.

e|----------------------------------------------|
B|-5---3---1---3---1----------------------------|
G|-5---------------------0--4-4-4---------------|
D|----------------------------------------------|
A|----------------------------------------------|
E|----------------------------------------------|
"Hey marry so I can"

e|----------------------------------------------|
B|-5---3---h7-----5-----------------------------|
G|-0-------------5------------------------------|
D|----------------------------------------------|
A|----------------------------------------------|
E|----------------------------------------------|
"have a happy new year"

e|----------------------------------------------|
B|----------------------------------------------|
G|-4-4-4-4h5-4-7-4-4h5-4-7-4--------------------|
D|----------------------------------------------|
A|----------------------------------------------|
E|----------------------------------------------|
"You're so pretty
People envy you"