On their Christmas album, they link this song right after Glory in the Highest so the 
intro is essentially the same as the latter.


Intro
G-Gsus-G Em C D-Dsus-D

Chorus 1:

G
O come let us adore Him
G             C    D
O come let us adore Him
  C           D     C
O come let us adore Him
G-D       C
Christ the Lord

Chorus 2:

For He alone is worthy
For He alone is worthy
For He alone is worthy
Christ the Lord

Chorus 3:

We'll give You all the glory
We'll give You all the glory
We'll give You all the glory
Christ the Lord!