E|-----------------------------------------------------------------|
B|-----------------------------------------------------------------|
G|-------------------------2---------2-----------------------------|
D|-----2---------2-------2---2-----2---2---------------------------|
A|---2---2-----2---2---3-------3-0-------2-------------------------|
E|-0-------0-3-------2---------------------------------------------|

Then, after the brief intro, just add the following chord sequence:

Em   G   Am  C

Add two parts water, mix briefly, and sing...you've got it. :)
It'll probably take one or two listens through the song to get the
part down correctly, but that should be it...it's not that difficult.