Ok guys, so I made this out of her SNL acoustic version, you can check it at her 
official vevo. It goes like this

Chords used:

     E   Gm  Cm  A
E |--0---4---4---5---|
B |--0---4---5---5---|
G |--0---4---6---6---|
D |--1---6---6---7---|
A |--2---6---4---7---|
E |--2---4---4---5---|


And that progression goes all throughout the song.


Let's go

 E
It’s our party we can do what we want
 Gm
It’s our party we can say what we want
 Cm
It’s our party we can love who we want
 A
We can kiss who we want
We can see who we want (2x)



 E
Red cups and sweaty bodies everywhere
 Gm
Hands in the air like we don’t care
 Cm
Cause we came to have so much fun now
 A
Bet somebody here might get some now

 E
If you’re not ready to go home
 Gm
Can I get a hell no
 Cm
Cause we gonna go all night
 A
Till we see the sunlight alright

 E
So la da di da di, we like to party
 Gm
Dancing with Miley
                 Cm
Doing whatever we want
            A 
This is our house
This is our rules

         E
And we can’t stop
        Gm
And we won’t stop
                  Cm
Can’t you see it’s we who own the night
                 A
Can’t you see it we who bout’ that life
        E
And we can’t stop
        Gm
And we won’t stop
        Cm
We run things, Things don’t run we
               A
We don't take nothing from nobody

It’s our party we can do what we want
It’s our party we can say what we want
It’s our party we can love who we want
We can kiss who we want
We can see who we want

To my home girls here with the big butt
Shaking it like we at a strip club
Remember only God can judge ya
Forget the haters cause somebody loves ya
And everyone in line in the bathroom
Trying to get a line in the bathroom
We all so turned up here
Getting turned up, yeah, yeah

So la da di da di, we like to party
Dancing with Miley
Doing whatever we want
This is our house
This is our rules
And we can’t stop
And we won’t stop
Can’t you see it’s we who own the night
Can’t you see it we who bout’ that life
And we can’t stop
And we won’t stop
We run things
Things don’t run we
We don't take nothing from nobody

It’s our party we can do what we want
It’s our party we can say what we want
It’s our party we can love who we want
We can kiss who we want
We can see who we want

It’s our party we can do what we want to
It’s our house we can love who we want to
It’s our song we can sing if we want to
It’s my mouth I can say what I want to
Yea, Yea, Yeah

And we can’t stop
And we won’t stop
Can’t you see it’s we who own the night
Can’t you see it we who bout’ that life
And we can’t stop
And we won’t stop
We run things
Things don’t run we
We don't take nothing from nobody
Yea, Yea, Yea