These aren't the chords she used in her acoustic version, they're for the album ver. 


VERSE 1:
                C                                
Don't think too hard 
                           G
If you think it hurts that bad
                Am                          
Don't talk about it 
                     F
Don't let it get you down
              C                
It's only one part 
       G
Of the story
            Am                              
Just let it go 
                       F    (G)
Don't let it bring you down now


CHORUS:
C                            F
Sing the last thing on your mind
                       C
The last word on your breath
                    G                          
I'll be the one to keep you 
                  C
Keep you at your best
                        F
The last thing on your mind
                          C
'Cause I don't need your mess
                   G                     
I'll be the one to keep you 
             C
One disaster less


VERSE 2:
                    C                  
Straighten up your tie
              G
Take the microphone
             Am                        
Forget about it 
                     F 
Don't let it get you down
                C                                
Now is not the time
                 G
And you're not alone
              Am                        
Shut up about it
                     F    (G)
No one can bring you down now

[CHORUS] Sing..
(except replace last chord with Am)

BRIDGE:
C      Am  F        
I'll be okay 
C       G        
I'll be okay, if you'll 

[CHORUS] Sing..