It's a very easy song. The one thing to note is that you just play the open E,A, and D strings and that the real fun in playing this is to add Little things to it to make it sound even prettier

Verse
g----------------------------------|
d-2-222--2-222-------------------|
a--------------------0-000--0-000|
e-----------------------------------|

Chorus
g----------------|
d-2------0----2-|
a-----0----------|
e----------------|

The rest of the song is either verse or the chorus or slower versions of the chorus.