this is the live version, and ive put the bass bit arranged for guitar so you can play 
all.

bass bit.(intro)

e---------------------------------------------------------------------------|
b---------------------------------------------------------------------------|
g---------------------------------------------------------------------------|
d---------------------------------------------------------------------------|
a---------------------------------------------------------------------------|
E--3-3-3-3-4-3-3--3-3-6-----------------------------------------------------|

guitar bit.
                                          carry on doing this until verse.
e-0---1-0--1-0-1-0-1-0--1-0-1-0-1-0-1-0-1-----------------------------------|
b-0---1-0--1-0-1-0-1-0--1-0-1-0-1-0-1-0-1-----------------------------------|
g---------------------------------------------------------------------------|
d---------------------------------------------------------------------------|
a---------------------------------------------------------------------------|
E---------------------------------------------------------------------------|

theres no guitar in the verse, just keep doing the bass part.

after Bret brings in the drums and mandolin. the Jemaine plays this bass bit.

e---------------------------------------------------------------------------|
b---------------------------------------------------------------------------|
g---------------------------------------------------------------------------|
d---------------------------------------------------------------------------|
a---------------------------------------------------------------------------|
E-3-3-4-3-3-6-3-3-4-3-4-3-4-------------------------------------------------|
then just keep playing until bret starts rapping, where Jenaine goes back to the intro 
part.