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

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

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

Chorus:
     A
dont worry bout a thing,
      D                               A
cause every little thing gonna be all right.
        A
Singin: dont worry ( dont worry ) bout a thing,
      D
cause every little thing gonna be all right!

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

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

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