Kate Nash - Merry Happy chords

This is for piano--sorry guitar folks. This is just the main riff that runs 
through the body of the song--she plays around with it some on the recording. The 
trick is not to fill the chords in. It sounds much better spare and open.

Intro: A5, A5/G, A5/F#,  A5/E           x2

[ Tab from: http://www.guitaretab.com/k/kate-nash/210165.html ]
A5
Watching me like you never watch no one
         A5/G
Don't tell me that you didn't try and check out my bum
              A5/F#
Cause I know that you did
                                                                A5/E
Cause your friend told me that you liked it

This continues for the rest of the song...