this is a good songa and its really easy certainly for a Xmas do!

     the verse is;
                  [Ab]until you sing 2nd XMAS then [Eb]


 you may want to fiddle with these chords to make it sound more rocky!
 I simply use barre chords and barre across with my little finger every other beat

 now the middle 8 is very melodic but not too hard if you keep to barre chords.

 [Db] until SENTIMENTAL then [Cm]until VOICES then [Fm]until DECK then
 [Bb] until BELLS then back to [Eb] to start the verse again.