These are the chords to the acoustic version played in "New Directions" (5x13),
message me if you have any corrections ;)

Timing:
1 * 2 * 3 * 4 * | 1 * 2 * 3 * 4 * |
D         A   G               A
   
   
Intro
D A G A 

Verse
D             A            G          A
You may think that I'm a zero
D                 A    G 
And everyone you wanna be
                          A
Probably started off like me

You may say that I'm a freak show
But give me just a little time
I bet you're gonna change your mind

Pre-Chorus:
Bm     F#m  G                  A         D
All of the dirt you've been throwin' my way
    A         G                 A
It ain't so hard to take
       Bm     F#m  G              A           D
'Cause I know one day you'll be screamin' my name
      A             G
And I'll just look away
(Yeah I'll just look away)

Chorus:
      D                           A        G
Just go ahead and hate on me and run your mouth
                 A
So everyone can hear
 D                                 A        G
Hit me with the worst you got and knock me down
               A
Baby, I don't care
D                                   A      G
Keep it up, and soon enough you'll figure out
      A   D        A    G
You wanna be, you wanna be
   A         Bm
A loser like me


Verse:
Push me up against the locker
All I do is shake it off
I'll get you back when I'm your boss

I'm not thinkin' 'bout you haters
I could be a superstar
I'll see you when you wash my car

Pre-Chorus

Chorus
A            D
A loser like me
A            D
A loser like me
A            G
A loser like me