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


Ab             Fm
Why are there so many
Db           Eb7
Songs about rainbows
Ab                 Fm   Db    Eb7
And what's on the other side
Ab             Fm
Rainbow's are visions
Db        Eb7
But only illusions
Ab                 Fm        Db    Eb7
And rainbows have nothing to hide
Db    
What's so amazing is that it keeps us star gazing
Cm7
What do they we think we might see?
Bbm            Eb7
Someday we'll find it
Ab           Fm
The Rainbow Connection


Bbm              Eb7           Ab             Eb7  


Eb7
The lovers, the dreamers and me
Ab             Fm
Have you been half asleep?
Db                      Eb7
And have you heard the voices
Ab                    Fm        Db    Eb7
Well I've heard them calling my name
Ab           Fm              Db               Eb7
Is this the sweet sound that calls the young sailors?
Ab                  Fm         Db    Eb7
The voice might be one and the same
Db    
I've heard it too many many times to ignore it
Cm7
Ooooohh and that I think it could be


Bbm                 Eb7
Well someday we'll find it
Ab           Fm
The Rainbow Connection
Bbm             Eb7           Ab
The lovers the dreamers and me
Bbm            Eb7
Someday we'll find it
Ab         Fm
a Rainbow Connection
Bbm                  Eb7            Ab
The lovers, oh, the dreamers, and me