The only chords used are:

D , A , F#m , E

These will last the entire song for all verses.

VERSE 1:
D
I was up in my head
A
For everything I said
F#m
Quarter million words
E
They're all made with lead
D
I bought a megaphone
A
To use inside your home
F#m
Forgot the batteries
E
But that's the old me

D           A
Shouting out of my windows
F#m           E
Rolled down
D          A
Cuz I don't care anymore
F#m    E
Said I don't care 

LET'S GO LET'S GO LET'S GO LET'S GO

CHORUS:

D               A
Ooooooooooh ooooooh ooooooh

F#m          E
Ooooooooooh ooooooh ooooooh  x 2

VERSE 2:

D
I'm standing on the top
A
Of a parking lot
F#m
I gave it all I had
E
Show me what you got

There's some things I found 

That make so much sound

All these words

I don't need em now

D             A
Shouting out of my windows
F#m    E
Rolled down
D                A
Cuz I don't care anymore
F#m           E
Said I don't care 

LET'S GO LET'S GO LET'S GO LET'S GO

CHORUS

BRIDGE:

D , A , F#m , E
D , A F#m , E

D
Say what you wanna say
A
Make it mean everything
F#m
Oh say what you wanna say
E
Make it mean everything   X2

LET'S GO LET'S GO LET'S GO LET'S GO

CHORUS