How to read tablature? 
Intro - x2, as Jason Mraz plays it -:
xBb----12--12--12-5-12-------|
xF--5-----------------------|
xEb--------------------------|
xAb-------6---6--------7-----|


Bb             Gm
Why are there so many
Eb           F7
Songs about rainbows
Bb                 Gm   Eb    F7
And what's on the other side
Bb             Gm
Rainbow's are visions
Eb        F7
But only illusions
Bb                 Gm        Eb    F7
And rainbows have nothing to hide
Eb    
What's so amazing is that it keeps us star gazing
Dm7
What do they we think we might see?
Cm            F7
Someday we'll find it
Bb           Gm
The Rainbow Connection


Cm              F7           Bb             F7  


F7
The lovers, the dreamers and me
Bb             Gm
Have you been half asleep?
Eb                      F7
And have you heard the voices
Bb                    Gm        Eb    F7
Well I've heard them calling my name
Bb           Gm              Eb               F7
Is this the sweet sound that calls the young sailors?
Bb                  Gm         Eb    F7
The voice might be one and the same
Eb    
I've heard it too many many times to ignore it
Dm7
Ooooohh and that I think it could be


Cm                 F7
Well someday we'll find it
Bb           Gm
The Rainbow Connection
Cm             F7           Bb
The lovers the dreamers and me
Cm            F7
Someday we'll find it
Bb         Gm
a Rainbow Connection
Cm                  F7            Bb
The lovers, oh, the dreamers, and me