This is a very easy song to play and is a good starting point for a novice wanting
to learn an interesting song which doesn't involve a mass of chord changes but
still sounds good. the pattern is the same throughout however it sounds better if
you hit the notes a little harder on the chorus. I prefer this to the version
which finishes on E because Am is easier and also thats how I play it on guitar.
Also on the first note of the C only hit the middle two strings (C & E)
the strumming pattern is along the lines of (C)D D DU (F)D D U D UD D D U D UD (G) D D (Am) D D DU DUD DUD but for clarity youtube has some excellent covers to help!
Intro: C F G Am x1
C F Am F
My Mess Know Sure
repeat pattern throughout the rest of the song hitting the notes a slightly harder for the Chorus and Bridge