Hey this is a really good song for a beginner or even just someone who wants to play a 
song. This should be correct, I took it straight from her live performance on mtv.com. Enjoy

Chords:
G     D     Cadd9    Em
3     3     3        0
3     2     3        0
0     3     0        0
0     0     2        2
2     x     3        2
3     x     x        0


Capo 1

Four Walls by Cheyenne Kimball

Intro: G - D - Cadd9 (x2)

Verse 1
G             D   Cadd9
These four walls, they whisper to me
G             D       Cadd9
They know a secret I knew they would not keep
Em            D      Cadd9
It didn't take long for the room to fill with dust
G               D      Cadd9         D
And these four walls came down around us

Chorus
Cadd9                 G        D
It must have been something to send me out of my head
Cadd9                  G       D
With the words so radical and not what I meant
Cadd9                             G
Now I wait for a break, in the silence cause it's all that you left
Cadd9                              G     D
Just me and these four walls again

Verse 2
Cadd9
It's hard now to let you be
G             D         Cadd9
I won't make excuses, I've made my peace
Em             D    Cadd9
It didn't take long for me to lose the trust
G                D       Cadd9             D
Cause these four walls, they're not strong enough

Chorus
Cadd9             G            D
It must have been something to send me out of my head
Cadd9                  G      D
With the words so radical and not what I meant
Cadd9                          G
Now I wait for a break, in the silence cause it's all that you left
Cadd9
Just me and these four walls again


Bridge
Em        Cadd9               G
Yeah it's difficult, watching us fade
G       D                  Em
Knowing it's all my fault, my mistake
Em        Cadd9                 G
Yeah it's difficult letting you down
G       D                  Cadd9           D
Knowing it's all my fault, that you're not around


Chorus
Cadd9             G            D
It must have been something to send me out of my head
Cadd9                  G       D
With the words so radical and not what I meant
Cadd9                          G
Now I wait for a break, in the silence cause it's all that you left
Cadd9
Just me and these four walls again

G  D  Cadd9 (x2)