Capo 1 - Standard Tuning 

           Em   Bm    C      Am
Let's play the blame game, I love you, more
          Em   Bm     Am
Let's play the blame game for sure.
           Em   Bm     C     Am
Let's call her names, names, I hate you, more.
           Em   Bm       Am
Let's call her names, names, for sure.  

            F#m     A
Let's play the blame game, I love you, more
           F#m  E     D
Let's play the blame game for sure.
           F#m       A
Let's call her names, names, I hate you, more.
           F#m  E       D
Let's call her names, names, for sure.

etc... 

 Intro:
e|---------------------------------|
B|---------------------------------|
G|--------------------9----9h11p9--|
D|--11------9-11----9---11---------|
A|-----9-12------12----------------|
E|---------------------------------|

Ok, so the piano bassline goes like this:
(going up)                          (going down)
e|---------------------------------------------|---------------------------------------------|
B|-----------------------------------------10--|--10----------------------------------10-----|
G|--------------------9--------11--------------|-----11------------11---11----11---------11--|
D|--11------9-11----9--------9----------11-----|--------11------11---------11------11--------|
A|-----9-12------12-------12---------12--------|-------------12------------------------------|
E|---------------------------------------------|---------------------------------------------|
Here's the high part, which is tabbed out to go parallel 
with the low part.
e|-----------------------12h14p12--------------|---------------------------------------------|
B|--14--------14-------14----------------------|---14------12--------------------14----------|
G|---------------------------------------------|-11---------------11-------11----------------|
D|---------------------------------------------|----------------14---11-14-------------------|
A|---------------------------------------------|---------------------------------------------|
E|---------------------------------------------|---------------------------------------------|
^^This one's missing some notes because guitars don't go that high

As for the chords if you want to just do an acoustic cover 
I know it's in F#m but I'm unsure of the other chords.
-2---5-|
-2---7-|
-2---6-|
-4---4-|
-4-----|
-2-----|
These two work well. 
Looking at the piano it seems that F#m is the key