Okay,
This is how I think the song goes, after playing it a lot.


Intro/Verse (Background)

e|-------------------|
B|-------------------|
G|-------------------|
D|-------------------|
A|------3~--------3~-|
E|-3~--------0~------|  play each note twice.

^the main guitar uses a bar chord across the 3.

Chorus

e|------------|
B|------------|
G|-5555-------|
D|-5555---222-|               repeats.
A|-3333---222-|
E|--------000-|