I've seen other tabs for this song, but they were complicated and didn't sound 
right, so I tweaked it, and this sounds better to me. Plus, it's really easy. :)

Verse 1:

 D          Am7                    C           G
Worthy is the Lamb who was slain. Holy, holy is He.
D             Am7              C                 G
Sing a new song to Him who sits on Heaven's Mercy Seat.
(REPEAT)


Chorus:
D              Am7
Holy, Holy, Holy is The Lord, God Almighty. 
C                        G
Who was and is and is to come.
D                         Am7
With all creation I sing, "Praise to The King of Kings,
C                         G                   D Am7 C G
You are my everything. And I will adore You".

Verse 2:
D                  Am7
Clothed in rainbows, of living color. 
C                            G
Flashes of lightening, rolls of thunder.
D                                Am7
Blessing and honor, strength and glory and power be,
C                     G
To You, the only wise King.

(CHORUS)

Verse 3: 
D                   Am7
Filled with wonder, awestruck wonder,
C                      G
At the mention of Your Name.
D                         Am7
Jesus, Your Name is power, breath and living water.
C                   G
Such a marvelous mystery.

(CHORUS)