Victoria Justice - Beggin On Your Knees chords

I couldn't figure out the name of the mystery chord, so I'll just put it on here 
(And the other ones):
F- 133211
C-335553 (You can use the regular one, too. I just think this sounds better)
Am-557765
?- 113331

F              C                   Am                   ?
You had it all, the day you told me, told me you want me

F            C                    Am                  ?
I had it all, but let you fool me, fool me completely
[ Tab from: http://www.guitaretab.com/v/victoria-justice/277459.html ]
      F         C                  Am       ?
Yeah, I was so stupid to give you all my attention
 
        F            C               Am          ?
Cause the way you played me exposed your true intentions

Chorus and other Verse: F,C,Am,?

Bridge:
C
I know I'm being bitter

But I'ma drive you under

Am
Cause you just don't,

Don't deserve a "happy ever after"

C 
but what you did to me

After you told me

      Am             ?
You never felt that way
                     C
it was only just a game
 
Chorus

And that's it! :)