I'm a novice guitar player, but these chords all sounded right. They may not be placed 
precisely in the lyrics where they're supposed to be, but they're very close at the 
worst. You can figure where they go by ear when playing anyways.

RIP Rilo Kiley. Or better yet come back from the dead.

Just in case I got the chord names wrong:
Cmaj7: 032000 (it may be x32000 actually)
C7: 032310 (x32310?)
Fm: 133111

Intro (yes the entirety of the first 1:47 intro is C)
C


C              Cmaj7
I should have known
        C7                                  F
With a boy like you, your middle name is always
      Fm                C
I'd always love you-oooh
       G     C   G
Uh-huhuh, yeah

C            Cmaj7
You let the needle drop
C7                                 F
I think that you could do so much better
          Fm
Those conventions are taking
       C          G   C   G
Their toll on you

      F
The phantom
G
Is disguised
     C
It's horrifyin'
Cmaj7             C7
Right before your eyes
      F
The phantom
G
Is inside

    C             Cmaj7
And I should have known
        C7                                F
With a boy like you your middle name is always
      Fm               C
I'd always want you-oooh
      G     C   G
Uh-huhuh yeah

     F
The phantom
G
Is disguised
      C
It's horrifyin'
Cmaj7             C7
Right before your eyes
     F
The phantom
G
Is inside
      C
It's hideous
Cmaj7             C7
Right before your eyes
     F
The phantom
    G
Is watching
C      Cmaj7    C7 (Am works fine too, but 
C7 makes more sense)
You---------------
    F
The phantom
             Fm
Is watching you
       C
(You)...