It only uses 4 chords, here's how I fret them:

CAPO 2ND FRET

e | ---3----------3------------3-----------2--------------------------------------- | 
B | ---3----------3------------3-----------3--------------------------------------- | 
G | ---------------------------------------2--------------------------------------- | 
D | ---2-----------------------2--------------------------------------------------- | 
A | ---3----------2------------2-----------x--------------------------------------- | 
E | ---x----------3------------------------x--------------------------------------- | 

   C5        G5           E5          D5


Strumming pattern is: Down Down, Up-Down (repeated consistently through the song)


Enjoy!


Intro: G5



      C5        G5
I've got soul, my mama says so
     E5                          D5
Says son you'll move up, you're a fighter, I know
       C5      G5
You will see that life isn't free
       E5            D5
And everyone dies eventually


G5                 C5
Gravity, you're knocking me out
       E5                  D5
You're shaking me up 'til I twist and I shout
     G5
Oh, gravity
   C5
It's okay in the clouds
       E5         C5          D5           G5
But I love it right here with my feet on the ground


   C5     G5
Celebrate, before it's too late
       E5                         D5
Your fear of the future's your greatest mistake
        C5       G5
Here's a song, we sing it out loud
         E5                      D5
And ain't nothing as sweet as the sound of a crowd


(Alright, now)
G5                C5
Gravity, you're knocking me out
         E5                 D5
You're shaking me up 'til I twist and I shout
     G5
Oh, gravity
   C5
It's okay in the clouds
      E5         C5           D5           G5
But I love it right here with my feet on the ground
  E5         C5           D5           G5
I love it right here with my feet on the ground


G5                   C5
Gravity, you're knocking me out
         E5                  D5
You're shaking me up 'til I twist and I shout
        G5
Oh, gravity
    C5
It's okay in the clouds
      E5         C5           D5           G5
But I love it right here with my feet on the ground
  E5         C5           D5           G5
I love it right here with my feet on the ground

And I'm singing,
G5                 C5
Gravity, you're knocking me out
          E5                 D5
You're shaking me up 'til I twist and I shout
       G5
Oh, gravity
   C5
It's okay in the clouds
       E5        C5          D5            G5
But I love it right here with my feet on the ground
  E5          C5          D5            G5
I love it right here with my feet on the ground
  E5          C5          D5            G5
I love it right here with my feet on the ground
  E5          C5          D5            G5
I love it right here with my feet on the ground
  E5          C5          D5            G5
I love it right here with my feet on the ground
  E5          C5          D5            G5
I love it right here with my feet on this ground
  E5          C5          D5            G5
I love it right here with my feet on the ground