I tried a few of the tabs for this song and they didn't quite sound right, so i 
transposed my own version for acoustic. This is my first tab, but it's pretty dead on.

Standard tuning
Capo 3rd fret


      D
e|----2~-----------------------------------------------------------------------|
B|----3~-----------------------------------------------------------------------|
G|----2~-----------------------------------------------------------------------|
D|----0~-----------------------------------------------------------------------|
A|----0~-----------------------------------------------------------------------|
E|----X------------------------------------------------------------------------|
    "Give me a second I, I need to get my story straight"

      Bbm
e|----2~-----------------------------------------------------------------------|
B|----3~-----------------------------------------------------------------------|
G|----4~-----------------------------------------------------------------------|
D|----4~-----------------------------------------------------------------------|
A|----2~-----------------------------------------------------------------------|
E|----X------------------------------------------------------------------------|
     "My friends are in the bathroom, getting higher than the empire state."

      G
e|----3~-----------------------------------------------------------------------|
B|----0~-----------------------------------------------------------------------|
G|----0~-----------------------------------------------------------------------|
D|----0~-----------------------------------------------------------------------|
A|----2~-----------------------------------------------------------------------|
E|----3~-----------------------------------------------------------------------|
   "My lover, she's 'a waiting for me, just across the bar"

      A
e|----X------------------------------------------------------------------------|
B|----2~-----------------------------------------------------------------------|
G|----2~-----------------------------------------------------------------------|
D|----2~-----------------------------------------------------------------------|
A|----0~-----------------------------------------------------------------------|
E|----X------------------------------------------------------------------------|
    "My seat's been taken by some sunglasses, askin' 'bout a scar."

   Repeat this until he says "by the time the bar closes"

                  G              A            D           A      G
e|----------------3--------------X------------2-----------X------3----------------|
B|----------------0--------------2------------3-----------2------0----------------|
G|----------------0--------------2------------2-----------2------0----------------|
D|----------------0--------------2------------0-----------2------0----------------|
A|----------------2--------------0------------0-----------0------2----------------|
E|----------------3--------------X------------X-----------x------3----------------|

  "So if by the time the bar closes, and you feel like falling down

     G               A       D                    Bbm
e|---3---------------x-------2---------------------2-------------------------------|
B|---0---------------2-------3---------------------3-------------------------------|
G|---0---------------2-------2---------------------4-------------------------------|
D|---0---------------2-------0---------------------4-------------------------------|
A|---2---------------0-------0---------------4-----2-------------------------------|
E|---3---------------X-------X---------------------X-------------------------------|
   "I'll carry, you home, tonight.........we are young........"


                                     G                                   A
e|-----------------------------------3-----------------------------------X-------|
B|-----------------------------------0-----------------------------------2-------|
G|-----------------------------------0-----------------------------------2-------|
D|-----------------------------------0-----------------------------------2-------|
A|---------------------0-------------2--------------------------2--------0-------|
E|-----------------------------------3-----------------------------------X-------|
    "....so let's set the world on fire, we can burn brighter, than the sun"


All of these chords and progressions keep the same pattern untill Janelle's part where 
he starts doing the "na-na's"

  D                  G            D               A
e|2------------------3------------2---------------X------------------------------|
B|3------------------0------------3---------------2------------------------------|
G|2------------------0------------2---------------2------------------------------|
D|0------------------0------------0---------------2------------------------------|
A|0------------------2------------0---------------0------------------------------|
E|X------------------3------------X---------------X------------------------------|
 "Carry me, home tonight.  Just carry me, home tonight."  (repeats)

The last part at the end is the exact same part as the "when the bar closes" progression.

Enjoy