How to read tablature? 
Riff:            
xA|---------------7-4-----|
xE|--5~-------------------|
xC|-----------------------|
xG|-------2h4p2------4p2--|

Chorus:
C
Dont worry about a thing,
      F                               C
cause every little thing gonna be all right.
C
dont worry about a thing,
      F                               C
cause every little thing gonna be all right!

Verse:
             C
Rise up this mornin,
                G
Smiled with the risin sun,
             F
Three little birds
            C
Pitch by my doorstep
             G
Singin sweet songs
            F
Of melodies pure and true,
        F
Sayin, - this is my message to you-ou-ou -

Chorus:
     C
dont worry bout a thing,
      F                               C
cause every little thing gonna be all right.
        C
Singin: dont worry - dont worry - bout a thing,
      F
cause every little thing gonna be all right!

Verse:
             C
Rise up this mornin,
                G
Smiled with the risin sun,
             F
Three little birds
            C
Pitch by my doorstep
             G
Singin sweet songs
            F
Of melodies pure and true,
        F
Sayin, - this is my message to you-ou-ou -

Chorus - repeat -:
C
dont worry about a thing, worry about a thing, oh!
F                               C
Every little thing gonna be all right. dont worry!
        C
Singin: dont worry about a thing - I wont worry!
      F
cause every little thing gonna be all right.

Outro: 
xA|---7-7-7--9-7----------|
xE|---------------4-5--5~-|
xC|-----------------------|
xG|-----------------------|