This is my first tab/chords and it may not be absolutely correct but its the 
easiest version in my opinion :)

Capo 4

Standard Tuning
Capo: 4
Chords Used: Am,F,C,E,G
---

 - Verse -
Am               F
She's resplendent, so confident 
C         E         Am
La Seine, La Seine, La Seine
Am               F
I realize I'm hypnotized 
C         E         Am
La Seine, La Seine, La Seine
Am               F
I hear the moon singing a tune 
C         E         Am
La Seine, La Seine, La Seine
Am               F
Is she devine? Is it the wine? 
C         E         Am
La Seine, La Seine, La Seine

 - Chorus -
Am                        F
I don't know, don't know, so don't ask me why 
            C   E  Am  
That's how we are, the Seine and I 
Am                        F
I don't know, don't know, so don't ask me why 
            C   E  Am   
That's how we are, the Seine and I 

 -Verse- 
Am               F
I feel alive when I'm beside 
C         E         Am
La Seine, La Seine, La Seine
Am               F
From this angle like an angel
C         E         Am
La Seine, La Seine, La Seine 

 - Chorus -
Am                        F
I don't know, don't know, so don't ask me why 
            C   E  Am  
That's how we are, the Seine and I 
Am                        F
I don't know, don't know, so don't ask me why 
            C   E  Am   
That's how we are, the Seine and I  

 - Bridge - (not too sure about this bit)
Am
Upon the bridge 
G
My heart does beat
Am
Between the waves 
F
We will be saved
Am
The air we breathe
G 
Can you believe?
Am                F
Learn to forgive upon the bridge 

 - Verse -
Am              F
* Random sounds *
          C   E  Am
That's how we are, the Seine and I
Am              F    
* Random sounds *
             C   E  Am   
That's how we are, the Seine and I
Am               F
* Random sounds *
             C   E  Am   
That's how we are, the Seine and I