This ones trickier to sing than play. 
Watch the the timing of the lyrics in the 3rd verse. 

Chords used  :
     F#7add4     F#7add4           F#7add4/G#        F#7add4/E
e----0-----------0------------------0----------------0--------|
b----0-----------0------------------0----------------0--------|
g----3-----------3------------------3----------------3--------|
d----4-----------4------------------4----------------4--------|
a----4-----------4------------------X----------------4--------|
e----2-----------2------------------4----------------0--------|

Intro 
(1st measure bass only)
F#                F#                G#                E
 
F#7add4           F#7add4           F#7add4/G#        F#7add4/E

F#7add4           F#7add4           F#7add4/G#        F#7add4/E

Verse 1
F#7add4           F#7add4           F#7add4/G#        F#7add4/E
     Children are innocent,     a - teenager's fucked up - in the head.
F#7add4          F#7add4            F#7add4/G#        F#7add4/E
 Adults are even more fucked up  And elderlies - are like childre-en
F#7add4           F#7add4           F#7add4/G#        F#7add4/E

Verse 2
F#7add4           F#7add4           F#7add4/G#        F#7add4/E
Will there be another race, to - come along and take over for us?
F#7add4           F#7add4           F#7add4/G#        F#7add4/E
Maybe martians could do - better than we've done. We'll make great pets!

Chorus
F#7add4           F#7add4                    
We'll make great pets! We'll make great pets!
F#7add4/G#        F#7add4/E           
We'll make great pets! We'll make great pets!
F#7add4           F#7add4
We'll make great pets! We'll make great pets!
F#7add4/G#        F#7add4/E           
We'll make great pets! We'll make great pe-ets!

Solo 1 (chords as chorus) 

Verse 3
F#7add4           F#7add4          F#7add4/G#        F#7add4/E
My friend says we're like the dinosaurs.  Only we are   -   doing our
F#7add4           F#7add4          F#7add4/G#        F#7add4/E
selves in!     Much faster than they  -  ever did. We'll make great pets!
F#                F#                G#                E
 
F#7add4           F#7add4           F#7add4/G#        F#7add4/E

F#7add4           F#7add4           F#7add4/G#        F#7add4/E

Chorus
F#7add4           F#7add4                    
We'll make great pets! We'll make great pets!
F#7add4/G#        F#7add4/E           
We'll make great pets! We'll make great pets!
F#7add4           F#7add4
We'll make great pets! We'll make great pets!
F#7add4/G#        F#7add4/E           
We'll make great pets! We'll make great pe-ets!

Solo 2 (chords as chorus)
                             
Chorus
F#7add4           F#7add4                    
We'll make great pets! We'll make great pets!
F#7add4/G#        F#7add4/E           
We'll make great pets! We'll make great pets!
F#7add4           F#7add4
We'll make great pets! We'll make great pets!
F#7add4/G#        F#7add4/E           
We'll make great pets! We'll make great pe-ets!

Outro
(1st measure bass only)
F#                F#                G#                E
 
F#7add4           F#7add4           F#7add4/G#        F#7add4/E

F#7add4           F#7add4           F#7add4/G#        F#7add4/E