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 (320003@1)                 BmI'll (x24432@1)be with you in apple blossom time,
C (x32010@1)                 G (320003@1)     Bm (x24432@1)        EmI'll (022000@1)be with you to change your name to mine.

Am (x02210@1)       DOne (xx0232@1)day in May
G (320003@1)      Bm (x24432@1)     EmYou (022000@1)will come and say:

Am (x02210@1)          D (xx0232@1)       G (320003@1) Bm (x24432@1)      Em"Happy (022000@1)is the bride the sun shines on today!"

Am D

G (320003@1)              Bm (x24432@1)                  CWhat (x32010@1)a wonderful wedding there's gonna be,

G (320003@1)    Bm (x24432@1)      G (320003@1)     Bm (x24432@1)    EmWhat (022000@1)a wonderful day for you and me!

Am (x02210@1)              DChurch (xx0232@1)bells will chime
G (320003@1) Bm (x24432@1)    EmYou (022000@1)will be mine
G (320003@1)      Bm (x24432@1)    GIn (320003@1)apple blossom time.