The song begins with Am kind of Am4.I play the intro like this

 | --------------e
 | --------------b
 | ------2-------g
 | ------2-------d
 | --------------a
 | ------x-------E

    A5            B5
      Get up and dance
     E5                    A5
      I'm in the mood for love
     A5                B5
      I wanna see you rise and shine
     E5                 A5
      On revelation's day
              A5
      We're about to explore
        B5
      About to ignore
     E5                 A5 
      In such an easy way
                A5                B5
      It's the perfect cure in a perfect world
     E5                 A5  A5 Am4
      On revelation's day

      C5    G5
I'm free
    D5       A5   Am4
At last I'm free
      C5    G5
I'm free
    D5        A5  Am4
At last I'm free
C5
You can't judge me
      D5              E5
Cuz' you don't know me

    A5            B5
      Get up and dance
     E5                     A5
      I'm in the mood for love
           A5            B5
      I reveal your insecurity
     E5                 A5
      On revelation's day
             A5             B5
      You're hanging in a puppetstring
     E5                    A5
      Let me relief your pain
                   A5
      You're the driving force
             B5    
      In an overkill
     E5                 A5   Am4
      On revelation's day

      C5    G5
I'm free
    D5       A5   Am4
At last I'm free
      C5    G5
I'm free
    D5        A5  Am4
At last I'm free
C5
You can't judge me
      D5              E5
Cuz' you don't know me


      D5
The gravity changes
            A5
Wants your love
    B5        E5
At last I'm free

 A5            B5
      Get up and dance
     E5                    A5
      I'm in the mood for love
     
      On revelation's day
       C5          G5           D5 
      Day   -    Day    -    Day  | X2
    A5                     Am4   X2 
      On revelation's day         | X2

      C5   G5
I'm free                  | X2
    D5       A5   Am4    X2
At last I'm free          | X2 
      C5   G5              X2
I'm free                  | X2
    D5       A5   Am4    X2
At last I'm free

                 C5 
On revelation's day