D - G - D - G - D - G - D - A

The structure is like this:

Intro
Verse/Chorus
Guitar Solo
Verse/Chorus
Guitar Solo/Outro

I say Verse/Chorus because there really is no defined verse or chorus. There's just parts where Dean sings
and parts where he doesn't.

There are some pull offs during these chords and Dean plays the A kind of strangely. Here is how the tab 
looks. 
(Each iteration of the chord is a stroke, such that two chords next to each other represent an upstroke and a
down stroke. An empty dash or - means you don't play on that up or down stroke)
  D        G        A
E|2222-00-| 3333-00-|- - - - -- - -|
B|3333-33-| 3333-33-|- - - - -- - -|
G|2222-22-| 0000-00-|- - - - -- - -|
D|0000-00-|0000-00-|11111112-1414-|
A|--------| 2222-22-|0 0 0 0 -0 0 -|
E|--------| 3333-33-|- - - - -- - -|

[Intro (no singing just playing the progression through once)]

D                       G
Baby, my head's full of wishes
D                       G
Baby, my head's full of pictures
D                       G
Baby, my head's full of colors
D                       A
Baby, my head's full of pictures of you

D                    G
Baby, I spend all my money
D                           G
Baby, don't think that it's funny
D                       G
Baby, my head's full of colors
D                       A
Baby, my head's full of pictures of you

[Guitar "solo"(2x through progression)]

D                       G            
Baby, my head's full of wishes
D                       G
Baby, my head's full of pictures
D                       G
Baby, my head's full of colors
D                       A
Baby, my head's full of pictures of you

D                    G
Baby, I spend all my money
D                           G
Baby, don't think that it's funny
D                       G
Baby, my head's full of colors
D                       A
Baby, my head's full of pictures of you