O Come All Ye Faithful by Chris Tomlin
Original Key: A
Today's Key: D
Time: 4/4 ~72

Intro
 [I | IV/I | I2 | IV/I:]

Verse 1: "O Come all ye faithful"
 I       IV2/I         
 I           V         (/ Verse 3 bass in)
 vim7 V/vii  I2 iiim7  I2 II Vsus
 I/iii IV2  V/vii I
 iim7 I/iii V

Chorus 1:
 I     /   | /   /   /   /      |
 I/iii IV2 | I/V V   /      I/V |
 IV    /   | V   /   I/iii  IV2 |
 I/V   V   | I   /

Interlude 1:
 [(I) / / Isus | I/iii / IV2 / :] (=2x)

Verse 2: "Sing Choirs of Angels"
 As Verse 1

Chorus 1
Interlude 1 (3x)

Verse 3: "Yea Lord we greet thee"
 Starts low; As Verse 1, 2

Chorus 1

Interlude 2:
 4[(I) / / Isus | I :]

Chorus 2: "We'll praise..." <-Same rhythm as Chorus 1, different chords
 I   iim7 | I/iii IV |
 I/V vim7 | I/V   V  |      (Even run up to vi before usual V iV)
 IV  /    | V  / vim7 IV|
 I/V V / I         \        (Alt submediant instead of mediant)

Interlude 3:
 [(I) / / Isus | / :]

Tag: "We'll praise..."   <-  (No bass)
 I   /    |   /   /         Like a variant to Chorus, esp. start & end
 I/iii IV | I/V vim7        Asc. skips ii and moves to I/iii a bar later
 IV2   /  | V / I/iii IV    resumes usual at IV2
 I/V V    | I /