I have seen a version of this song with a capo; this version is without and 
should be played with bar chords. The chords are placed above the words they
occur on. The chord pregression remains the same throughout the song, but it
is all put in anyways. Enjoy!

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Intro:

G#m      B      F#     E



Chorus 1:

           G#m               B
It's going down, I'm yelling timber
           F#               E
You better move, you better dance
             G#m                B
Let's make a night, you won't remember
            F#                E
I'll be the one, you won't forget
            G#m               B
Oo-----------oh                 Oo---oh
            F#                E
                Oo-------------------oh
            G#m               B
Oo-----------oh                 Oo---oh
            F#                E
                Oo-------------------oh



Verse 1:

    G#m
The bigger they are, the harder they fall
     B
This biggity boy's a diggity dog
  F#       
I have them like Miley Cyrus,clothes off 
E
Twerking with my bras and thongs, timber
G#m
Face down, booty up, timber
B      
That's the way we like the war, timber
    F#
I'm slicker than an oil spill
            E
She say she won't, but I bet she will, timber



Pre-Chorus:

G#m
Swing your partner round and round
B
End of the night, it's going down
F#
One more shot, another round
E
End of the night, it's going down
G#m
Swing your partner round and round
B
End of the night, it's going down
F#
One more shot, another round
E
End of the night, it's going down



Chorus:

           G#m               B
It's going down, I'm yelling timber
           F#               E
You better move, you better dance
             G#m                B
Let's make a night, you won't remember
            F#                E
I'll be the one, you won't forget
           G#m               B
It's going down, I'm yelling timber
           F#               E
You better move, you better dance
             G#m                B
Let's make a night, you won't remember
            F#                E
I'll be the one, you won't forget
            G#m               B
Wo-----------ah                 Wo---ah
            F#                E
                Wo-------------------ah
            G#m               B
Wo-----------ah                 Wo---ah
            F#                E
                Wo-------------------ah



Verse 2:

G#m
Look up in the sky, it's a bird, it's a plane
B
Nah, it's just me, ain't a damn thing changed
F#
Live in hotels, swing on plane
E
Blessed to say, money ain't a thing
G#m
Club jumping like Lebron, now, Voli
B
Order me another round, homie
F#
We about to climb, wild 
       E
'cause it's about to go down



Pre-Chorus:

G#m
Swing your partner round and round
B
End of the night, it's going down
F#
One more shot, another round
E
End of the night, it's going down
G#m
Swing your partner round and round
B
End of the night, it's going down
F#
One more shot, another round
E
End of the night, it's going down



Chorus:

           G#m               B
It's going down, I'm yelling timber
           F#               E
You better move, you better dance
             G#m                B
Let's make a night, you won't remember
            F#                E
I'll be the one, you won't forget
           G#m               B
It's going down, I'm yelling timber
           F#               E
You better move, you better dance
             G#m                B
Let's make a night, you won't remember
            F#                E
I'll be the one, you won't forget
           G#m               B
Wo-----------ah                 Wo---ah
            F#                E
                Wo-------------------ah
           G#m               B
Wo-----------ah                 Wo---ah
            F#                E
                Wo-------------------ah
           G#m               B
Wo-----------ah                 Wo---ah
            F#                E
                Wo-------------------ah
           G#m               B
Wo-----------ah                 Wo---ah
            F#                E
                Wo-------------------ah



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Lyrics taken from:
http://www.metrolyrics.com/timber-lyrics-pitbull.html