This may be a Piano song but I play it on guitar.  Bascially you can strum the chords or 
hit the bass string and finger pick the bottom 3 strings one at a time.  Just listen to 
the song.  This is my 1st tab and I just love the song so much that I had to figure it out.

G                   Bm
I'll be with you in apple blossom time,
C                   G       Bm          Em
I'll be with you to change your name to mine.

Am         D
One day in May
G        Bm       Em
You will come and say:

Am            D         G   Bm        Em
"Happy is the bride the sun shines on today!"

Am D

G                Bm                    C
What a wonderful wedding there's gonna be,

G      Bm        G       Bm      Em
What a wonderful day for you and me!

Am                D
Church bells will chime
G   Bm      Em
You will be mine
G        Bm      G
In apple blossom time.