It's the same chord progression throughout the song Abm B Gb E.
-Ke$ha-
Abm B
It's going down, I'm yelling timber
Gb E
You better move, you better dance
Abm B
Let's make a night, you won't remember
Gb E
I'll be the one, you won't forget
Abm B Gb E
wooooo oooooh
-Pitbull-
The bigger they are, the harder they fall
This biggity boy's a diggity dog
I have 'em like Miley Cyrus, clothes off
Twerking in their bras and thongs, timber
Face down, booty up, timber
That's the way we like the war, timber
I'm slicker than an oil spill
She say she won't, but I bet she will, timber
Swing your partner round and round
End of the night, it's going down
One more shot, another round
End of the night, it's going down
Swing your partner round and round
End of the night, it's going down
One more shot, another round
End of the night, it's going down
-Ke$ha-
It's going down, I'm yelling timber
You better move, you better dance
Let's make a night, you won't remember
I'll be the one, you won't forget
It's going down, I'm yelling timber
You better move, you better dance
Let's make a night, you won't remember
I'll be the one, you won't forget
woooo oooooh
-Pitbull-
Look up in the sky, it's a bird, it's a plane
Nah, it's just me, ain't a damn thing changed
Live in hotels, swing on plane
Blessed to say, money ain't a thing
Club jumping like Lebron, now, Voli
Order me another round, homie
We about to climb, wild, 'cause it's about to go down
Swing your partner round and round
End of the night, it's going down
One more shot, another round
End of the night, it's going down
Swing your partner round and round
End of the night, it's going down
One more shot, another round
End of the night, it's going down
-Ke$ha-
It's going down, I'm yelling timber
You better move, you better dance
Let's make a night, you won't remember
I'll be the one, you won't forget
It's going down, I'm yelling timber
You better move, you better dance
Let's make a night, you won't remember
I'll be the one, you won't forget
woooooooooo oooohhhhhh