There were a few Judy Garland versions of this floating around but they didn't sound 
right to me so I've tweaked them and the result is here. I've filed this as Eva Cassidy 
she in my opinion took possession of this song with her rendition.

I've put repeated chords to show the timing of how I play it:
Each chord is played downstroke, downstroke, upstroke

Intro:   C  G Em Am D G

G   G     Bm       Bm
Somewhere over the rainbow
C   Cm     G    G7
    Way up high
C       Cm   G           Em
There's a    land that I heard of
Am        D    G   G
Once in a lullaby


G   G     Bm       Bm
Somewhere over the rainbow
C   Cm        G    G7
    Skies are blue
C   Cm  G               Em      Am
And the dreams that you dare to dream
       D       G    G
Really do come true


G                   G
Some day I'll wish upon a star
    C                 Cm             Em Em  Em
And wake up where the clouds are far behind me
      G                  G
Where troubles melt like lemondrops
 F#7           F#7
Away above the chimney tops
       Bm    Bm     Am   D
That's where you'll find me

G   G     Bm       Bm
Somewhere over the rainbow
C   Cm        G    G7
    Bluebirds fly
C     Cm  G        Em
Birds fly over the rainbow
Am           D         G   G
Why then, oh why can't I?

G                   G
Some day I'll wish upon a star
    C                 Cm             Em Em  Em
And wake up where the clouds are far behind me
      G                  G
Where troubles melt like lemondrops
 F#7           F#7
Away above the chimney tops
       Bm    Bm     Am   D
That's where you'll find me

G   G     Bm       Bm
Somewhere over the rainbow
C   Cm        G    G7
    Bluebirds fly
C     Cm  G        Em
Birds fly over the rainbow
Am           D         G   G
Why then, oh why can't I?

  G             G7
If happy little bluebirds fly
  C
Beyond the rainbow
Am      D        G
Why, oh why can't I?

F#7 - 353433