The tuning is kinda of nutty and there is one challenging stretch in here (the 4th chord
the verses) and so I put this tab as intermediate. To adjust to this tuning base your
off the low A and D because those two won't be changing. As for the timing, listen to 
song and you will get it.

(the first 5 chords of the verses are the same idea as the intro with some higher notes
played on top. I believe these notes to be
                                                 D----7------|
                                                 A----7------|
                                                 F#---7------|
                                                 D-----------|
                                                 A-----------|
                                                 D-----------|
ok,onto the song)

Verse:

Butter....                          When Suddenly...

D--------------------------------|--------------------------------------------|
A--------------------------------|--------------------------------------------|
F#-------------------------------|--------------------------------------------|
D---7----7----7----7----0--------|---7----7----7----7----0--------------------|
A---7----7----7----7----0--------|---7----7----7----7----0--------------------|
D---7----6----4----2----0--------|---7----6----4----2----0--------------------|

I heard...                            I almost...

D--------------------------------|-------------------------------------------|
A--------------------------------|-------------------------------------------|
D--------------------------------|-------------------------------------------|
F#--9----11----12----------------|-----4----0--------------------------------|
A---9----11----12----------------|-----4----0--------------------------------|
D---9----11----12----------------|-----4----0--------------------------------|

Chorus:

But Megan I...

D------------------------------|---------------------------------------------|
A------------------------------|---------------------------------------------|
F#-----------------------------|---------------------------------------------|
D----------7----7----5----4----|----9----12----14----------------------------|
A----------7----7----5----4----|----9----12----14----------------------------|
D----------7----6----5----4----|----9----12----14----------------------------|

Background during solo:

D--------------|------------------------|----------------------------------|
A--------------|------------------------|----------------------------------|
F#-------------|------------------------|----------------------------------|
D----4----0----|----7----7----5----4----|----9----12----14-----------------|
A----4----0----|----7----7----5----4----|----9----12----14-----------------|
D----4----0----|----7----6----5----4----|----9----12----14-----------------|

outro:

Butter...

D-----------------------------------------------------------------------------|
A-----------------------------------------------------------------------------|
F#----------------------------------------------------------------------------|
D----7----7----7----7---------------------------------------------------------|
A----7----7----7----7---------------------------------------------------------|
D----7----6----4----7---------------------------------------------------------|

structure of song:

intro
verse 1
chorus
verse 2
chorus
solo
verse 3
chorus
outro

Great song, hope you enjoy playing it as much as I do.