I noticed Brian plays the song in the key of A but i like to play it in D , so 
just move every chord from D to A if you like to play it like Brian.

The intro is basicly a D chord with base notes on the A string.

D --0-------0------1
A ----3-2-1---3-2-0-

D                   
Well whatcha gonna do
When the bells don't chime
G
There's nothin' you can do
             D
To make em ring

D
Whatcha gonna do
             Bm
When you ain't mine
        E
You'll find out
               A
That you had everything

D
When the bell's don't chime
                     D7
When they don't even ring
      G
Your heart feels broken
     E
You can't even sing


D
Whatcha gonna do
Bm                    E
When the bells don't chime
G
You're gonna wish
A
You still had me