savannah did an outstanding cover of this song on youtube and these are the chords she 
used, she did some odd D-chords and i'm not exactly sure what they are called but i'll 
tab them for ya

e|--3--4-------------------------------|
B|--4--4-------------------------------|
G|--5--5-------------------------------|
D|-------------------------------------|
A|-------------------------------------|
E|-------------------------------------|

*only play ^^ those chords where it says (D chords) where just says "D" play a regular D.
*Savannah picks most of the song, you can listen to the video, it's a pretty 
simple picking pattern.
*Enjoy

capo 1

Intro. G-Em-Cadd9-D


G       Em          (D chords)
Somewhere over the rainbow
Cadd9     G
Way up high
Cadd9         G
There's a land that I heard of
Cadd9           D     G
Once in a lullaby.

G       Em         (D chords)
Somewhere over the rainbow
Cadd9        G
Skies are blue,
Cadd9          G                             Cadd9
And the dreams that you dare to dream
D                          G
Really do come true.

G
Someday I'll wish upon a star
Cadd9
And wake up where the clouds are far
G               D
Behind me.
G
Where troubles melt like lemon drops
A
Away above the chimney tops
D                              D (strum)
That's where you'll find me.

G        Em     (D chords)              Cadd9
Somewhere over, over the rainbow
Cadd9      G
Bluebirds fly.
Cadd9    G
Birds fly over the rainbow.
Cadd9           D        G
Why then, oh why can't I?

---one strum for each of these next chords----

G
If happy little bluebirds fly
Cadd9
Beyond the rainbow
D                         G
Why, oh why can't I?