I was just randomly strumming my guitar while listening
to this song when I accidently stumbled on something that
sounded close to it.  I don't think its completely accurate,
but it worked for me.

Standard Tuning

A5   x09800  or  009900
B5   7x9800  or  7x9900
C5   9x9800  or  9x9900
On these chords ^ I couldn't decide which sounded better
and I have no idea if those chord names are right...

E    022100
Bsus 024400
C#m  046600
A    002200

Intro/Verse/PreChorus:
B5    A5    C5    A5 
(emphasis on the bass strings)

Chorus:
E     Bsus    C#m    A

After the first round a trumpet (or some instrument) comes in... this is the
guitar version:

G|-9---8---9---13---9---8---9------9---8---9---13---9---8---6
(it repeats every once in a while throughout the song)

Intro/Verse/PreChorus:
B5    A5    C5    A5 
(emphasis on the bass strings)

Chorus:
E     Bsus    C#m    A

then the electric guitar/drums/everyone else comes in on the A
and the chorus continues...

Feel free to make any comments, or suggestions... and enjoy
-Bryce