This is the easiest song ever!!!!

standard tuning

The studio version goes like this through the whole song.

e
b
g    55
d 55 55
a 55 33
e 33

 But they did a live version that sounds a little different. It goes like this through the whole song.

e
b
g    77
d 77 77
a 77 55  
e 55

However, in the middle of the live version, the bass player does this pathetic solo thing (all it is is the root note of each power chord).

e
b
g
d
a      5555
e 5555       over and over until the chorus