The song is really a piano song, if you know how it goes, you should get the rhythm, but 
that really most of the song is done with these chords played as quarter notes and 
descending. I figured this out on my own, if you have any corrections leave a comment :)

Bb
Back to the street where we began
                           Bb/A    Gm
Feeling as good as lovers can, you know
            Dm        Eb
Yeah we're feeling so good

Bb                       Bb/A
Back to the street where we began
Gm                 Bb/A                 Gm (someone 
A major there for A second)
Feeling as good as love, you could, you can

Chorus
            Eb          F     Bb
'Cause it's nine in the afternoon
         Bb/A                     Gm
And your eyes are the size of the moon
                                Dm
You could 'cause you can so you do

We're feeling so good
         Eb
just the way that we do
          F                 Bb
When it's nine in the afternoon
     Bb/A                     Gm
Your eyes are the size of the moon
                                Dm
You could 'cause you can so you do
      Eb
We're feeling so good
(kinda a weird time signature)


And thats about it, theres a few little tricks done with those chords throughout the 
but thats just about the foundation of it.