Standard (EADGBE)
Verse riff
Chorus riff
C5 D5 G5 (The D5 is only for about a beat right before the G5)
Post-Chorus (It's no fun!):
for this bit I like to use 4 string power chords higher on the neck like so:
That's all you need. The song is just these 4 sections repeated. Enjoy.