Have your fingers in a C chord position, but put your pinky on the third fret of the G string. 

e|---------0---------------0---|
B|-1---------1-----1---------1-|
G|----3--------------3---------| Repeat for the whole song!
D|------2--------------2-------|
A|-3--------------3------------|
E|--------3---------------3----|

I find it alot easier like this! :)