It's a great song, easy to play but very funny.
There are only two parts which are easy to play.

Am / G / C / G/
Am / G / C / C/
This is the refrain, too. But in the refrain it's played with distortion.

C5 / B5 / E5
This part is always played with distortion.
For the chord change just listen to the song.

That's the whole song. If i've made a mistake or my English is too bad e-mail me to : ThomasPappert@gmx.de