This is my first tab so I hope you enjoy it! 
I think this version is the most similar to the original song, 
I'm sorry if you find any mistakes but it's natural 
(remember that it's just my own interpretation of the song) Thanks! :) //Baby.doll



Intro: Am F C G


Verse 1:         
         Am        F
When I was a young boy
      C
I was living for the moment
    G
The world was wide open
    Am          F
I had every choice
   C
But with so many choices
        G
I just didn't know what to do now
 Am             F
All I say is forget it
                      C
If you tell me I'll regret it
 
Just let it be what it is
 G
Coz it's so easy to say 


Chorus:
C         F                Am          G
If I knew yesterday what I know today, where would I be tomorrow
 C               F              Am
I won't let my soul slide away, I'd do whatever it takes
                       G
Coz this time's only borrowed 
F               C         G         Am
I got one life, one life, one life and I'm gonna live it
F               C         G        Am
I got one life, one life, one life and I'm gonna live it right
 

Verse 2:
        Am         F    
My daddy sat me down, 
        C                          G
he said "Son it's probably time to start making some plans"
           Am              F
And I said "No, not right now"
       C
With so many choices
   G
I just didn't know what to do now
  Am             F                               
All I'd say is forget it 
                       C
When he'd tell me I'd regret it 

Just let it be what it is, 
G
Coz it's so easy to say 


Chorus:
 C         F              Am            G
If I knew yesterday what I know today, where would I be tomorrow
C         F                     Am 
I won't let my soul slide away, I'd do whatever it takes
                         G
Coz this time's only borrowed 
     F           C        G            Am
I got one life, one life, one life and I'm gonna live it
     F           C        G            Am
I got one life, one life, one life and I'm gonna live it right 


Bridge:
            F                 C
You say the more you think you know what's right
    G                     Am
The less you do what you feel inside
      F                 C
So I won't pretend that I always know
       G                Am
I just follow my heart wherever it goes
     F                 C
And I may not always get it right
       Bb
But at least I'm living coz I've only got this... 

F         C         G         Am                 F    C   G 
One life, one life, one life, I've got this one life

Chorus: 
 C         F              Am            G
If I knew yesterday what I know today, where would I be tomorrow
C              F                Am            
I won't let my soul slide away, I'd do whatever it takes
                           G
Coz this time's only borrowed 
      F          C        G            Am
I got one life, one life, one life and I'm gonna live it
      F          C        G            Am
I got one life, one life, one life and I'm gonna live it right 

Verse 3:
       Am        F        
When I'm an old man, 
              C
hope I'll be rocking in my chair 
 G
Smiling to myself 
            Am      F
I'll tell my baby girl
           C            D
"You only get one life, so make sure you live it right"