Pretty sure this is exaclty how Austin plays it, hope this helps you :)
–Pippa

NO CAPO 

G     Dsus4/F#
Well, let's go back to the day.
Em7   Cadd9          G   Dsus4/F#      Em7  Cadd9
When I saw your face for the very first time.
G     Dsus4/F#           Em7   Cadd9
Well let's go back again when I held your hand.
G  Dsus4/F#     Em7 Cadd9
Stare into your eyes.

Am
Cause I knew you were the one.
Em
But my life has just begun.
C                      D
Baby, you can count on me.
           G  Dsus4/F# Em7 Cadd9   G Dsus4/F# Em7 Cadd9
Cause your heart–t–t is in my hand.
           G  Dsus4/F# Em7 Cadd9   G Dsus4/F# Em7 Cadd9
Cause your heart–t–t is in my hand.

(Same as verse 1)
Well let's go back in time on this.
Always knew that you'd be mine.
And I'm never gonna find someone as beautiful as you, girl.

(Same as verse 1)
Got my hand right your waist.
Look in your eyes.
Kiss your lips, touch up on your face.

(Same as pre chorus)
Can't forget the way I see you smile.
Cause I knew you were the one.
With you, my life has just begun.
Baby, you can count on me.

(Same as chorus)
Cause your heart–t–t is in my hand.
Cause your heart–t–t is in my hand.
O–o–oh yeah.