The song is basicly 2 chord progressions after one another, to get the best sound 
play bar chords; 
Prog 1.
   C    G    C    G    C    G    C    G
e|-----------------------------------------|
b|-8----12---8----12---8----12---8----12---|
G|-9----12---9----12---9----12---9----12---|
D|-10---12---10---12---10---12---10---12---|
A|-10---10---10---10---10---10---10---10---|
E|-8---------8---------8---------8---------|

Prog 2.
   G    Am  Em    D    G   Am    Em   D
e|----------------------------------------|
b|-3----5----8----7----3----5----8----7---|
G|-4----5----9----7----4----5----9----7---|
D|-5----7----9----7----5----7----9----7---|
A|-5----7----7----5----5----7----7----5---|
E|-3----5--------------3----5-------------|

Intro
(prog 1.)
C             G           C             G
ooh ooh oooh, ooh oh ohh, ohh ooh oooh      x2


Verse (prog 1.)
C           G              C             G
I sit tight, don't want to miss the show
C         G               C            G
I hang on, don't want to miss my prime
(prog 2.)
       G            Am        Em          D
'Cause time will fly, upon my baby's back
G            Am        Em            D
Time will fly, upon my baby's back
(Prog 1.)
C           G         C           G
Stay a while, my baby wants me to
C            G        C          G
Don't you go, my baby begs me so
(prog 2.)
    G            Am        Em          D
But tide will dry, upon my baby's back
G             Am       Em           D
Tide will dry, upon my baby's back


Chorus
(Prog 1.)
      C      G
I get weak
      C      G
I get weary
      C      G
I miss sleep
      C      G
I get moody
      G          Am
I'm in thoughts
        Em      D
I write songs
       G       Am
I'm in love
       Em      D
I walk on


Verse
(prog 1)
Fingers crossed, my time is coming now
Don't you go, my baby begs me so
(Prog 2)
Time will fly, upon my baby's back
Time will fly, upon my baby's back


Chorus
(Prog 1)
I get weak
I get weary
I miss sleep
I get moody
(Prog 2)
I'm in thoughts
I write songs
I'm in love
I walk on


Outro
(prog 1.)
C             G           C             G
ooh ooh oooh, ooh oh ohh, ohh ooh oooh      x2

Prog 1. once more and end.