Intro: 
C C/G C/G  (Repeat 10 measures) First two measures, just bass and drums. 
                                On 2nd time, lead kicks in.
F    (Repeat for 4 measures)      

Verse:
C    F  C
Alle-lu-ia
C    F
Alle-lu-ia
(still F)                 C
For our Lord God Almighty Reigns
C    F  C
Alle-lu-ia
C    F
Alle-lu-ia
(still F)                 C
For our Lord God Almighty Reigns
C    F
Alle-lu-ia  (2ndX, 3 beats of silence before "Holy")

Chorus:
     C     C
Ho-o-ly, Holy
        C              G
Are You Lord God Almighty
              F
Worthy is the Lamb
              F (3rdX, Fm/G#)
Worthy is the Lamb    
          C     C
You are Holy, Holy (3rdX, go to ending.)
C              G
Are You Lord God Almighty
              F
Worthy is the Lamb
              F (2ndX, Fm/G#)
Worthy is the Lamb
          C
You are Holy (2ndX, repeat to beginning of Chorus.)

Repeat all of the above

Ending:
Mac just keeps singing "You are Holy..." while the band gets funky with these power chords:
Ab  Bb  C