I saw Plain White T's perform this song on The Tonight Show with Jay Leno, and Tim was 
a capo on the 8th fret and Tom on the 4th.
Gtr. 1 (acoustic): Capo 8 [All guitars are in standard tuning, EADGBE]
Gtr. 2 (acoustic): Capo 4 [All chords are relative to capo]
Gtr. 3 (electric): no capo
ALL Chords in parenthesis are Gtr.2
I'm not really sure about the A/C (Gtr. 2) in the chorus but the way I play it is:
E-------|B--2----|G--2----|D--2----|A--3----|E-------|
Intro:Gtr. 1: (Capo 8)E-------------------------------------------------------------------------|B-----------------1-1-1-1-1-1-----------1-1-1-1-1-1-----------------------|G--0---0----------0-0-0-0-0-0--0---0----0-0-0-0-0-0---0-------------------|D----3---2--------2-2-2-2-2-2----3---2--2-2-2-2-2-2-----3-----------------|A-----------3-----3-3-3-3-3-3-----------3-3-3-3-3-3-------2--3------------|E-------------------------------------------------------------------------|
Gtr. 2: (Capo 4)E--0-----0--------0-0-0-0-0-0--0-----0--0-0-0-0-0-0---0-----0-------------|B----0-4----------0-0-0-0-0-0----0-4----0-0-0-0-0-0-----0-4---------------|G-----------------1-1-1-1-1-1-----------1-1-1-1-1-1-----------------------|D-----------------2-2-2-2-2-2-----------2-2-2-2-2-2-----------------------|A-----------------2-2-2-2-2-2-----------2-2-2-2-2-2-----------------------|E-----------------0-0-0-0-0-0-----------0-0-0-0-0-0-----------------------|
Verse 1:
(E)                     (B)
 C                       G
My head is stuck in the clouds
(E)                 (B)
 C                   G
She begs me to come down
    (C#m)      (B)      (A)    (B)
     Am         G        F      G
Says "Boy, quit foolin' around"
(E)                     (B)
 C                       G
I love the view from up here
(E)                     (B)
 C                       G
Warm sun and wind in my ear
     (C#m)     (B)         (A)
      Am        G           F
We'll watch the world from above
     (B)                   (E)     (E7)
      G                     C       C7
As it turns to the rhythm of love
Chorus 1:
      (A)             (E) (E7)
       F               C   C7
We may only have tonight
             (A)                (E)
              F                  C
But 'till the morning sun you're mine
(A/C) (C#m)
 E/G# Am
 All  mine
(C#m)   (B)    (A)
Am       G      F
Play the music low
   (B)                  (E)
    G                    C
and sway to the rhythm of love
Interlude 1: (They begin to play this about the time he says "rhythm" in the last line)Gtr. 1: (Capo 8)E-------------------------------------------------------------------------|B-----------------1-1-1-1-1-1-----------1-1-1-1-1-1-----------------------|G--0---0----------0-0-0-0-0-0--0---0----0-0-0-0-0-0---0-------------------|D----3---2--------2-2-2-2-2-2----3---2--2-2-2-2-2-2-----3-----------------|A-----------3-----3-3-3-3-3-3-----------3-3-3-3-3-3-------2--3------------|E-------------------------------------------------------------------------|
Gtr. 2: (Capo 4)E--0-----0--------0-0-0-0-0-0--0-----0--0-0-0-0-0-0---0-----0-------------|B----0-4----------0-0-0-0-0-0----0-4----0-0-0-0-0-0-----0-4---------------|G-----------------1-1-1-1-1-1-----------1-1-1-1-1-1-----------------------|D-----------------2-2-2-2-2-2-----------2-2-2-2-2-2-----------------------|A-----------------2-2-2-2-2-2-----------2-2-2-2-2-2-----------------------|E-----------------0-0-0-0-0-0-----------0-0-0-0-0-0-----------------------|
Verse 2:
(E)                   (B)
 C                     G
My heart beats like a drum
(E)                    (B)
 C                      G
A guitar string to the strum
 (C#m)     (B)        (A)
  Am        G          F
A beautiful song to be sung
(B)
 G
She's got
(E)                     (B)
 C                       G
Blue eyes deep like the sea
(E)                                   (B)
 C                                     G
That roll back when she's laughing at me
   (C#m) (B)         (A)
    Am    G           F
She rises up like the tide
   (B)                 (E)
    G                   C
The moment her lips meet mine
Chorus 2:
      (A)             (E) (E7)
       F               C   C7
We may only have tonight
             (A)                (E)
              F                  C
But 'till the morning sun you're mine
(A/C) (C#m)
 E/G# Am
 All  mine
(C#m)   (B)    (A)
Am       G      F
Play the music low
   (B)                  (E)
    G                    C
and sway to the rhythm of love
Interlude 2: (Play the same as the end of the first chorus)Gtr. 1:E-------------------------------------------------------------------------|B-----------------1-1-1-1-1-1-----------1-1-1-1-1-1-----------------------|G--0---0----------0-0-0-0-0-0--0---0----0-0-0-0-0-0---0-------------------|D----3---2--------2-2-2-2-2-2----3---2--2-2-2-2-2-2-----3-----------------|A-----------3-----3-3-3-3-3-3-----------3-3-3-3-3-3-------2---------------|E-------------------------------------------------------------------------|
Gtr. 2: (Capo 4)E--0-----0--------0-0-0-0-0-0--0-----0--0-0-0-0-0-0---0-----0-------------|B----0-4----------0-0-0-0-0-0----0-4----0-0-0-0-0-0-----0-4---------------|G-----------------1-1-1-1-1-1-----------1-1-1-1-1-1-----------------------|D-----------------2-2-2-2-2-2-----------2-2-2-2-2-2-----------------------|A-----------------2-2-2-2-2-2-----------2-2-2-2-2-2-----------------------|E-----------------0-0-0-0-0-0-----------0-0-0-0-0-0-----------------------|
Bridge:
(G#)     (A)     (E)  (B)
 E        F       C    G
When the moon is low
(G#)   (A)      (E)  (B)  (A)
 E      F        C    G    F
We can dance in slow motion
(A)          (B)             (A)
 F            G               F
And all your tears will subside
(A)          (B)        (E)
 F            G          C
And all your tears will dry
(E)            (B)
 C              G
Ba ba ba ba ba ba
(E)            (B)
 C              G
Ba ba ba ba ba ba
(C#m)    (B)        (A)   (B)
 Am       G          F     G
Da da da dum da da da dum
 (E)           (B)
 C              G
Ba ba ba ba ba ba
(E)            (B)
 C              G
Ba ba ba ba ba ba
(C#m)    (B)        (A)   (B)
 Am       G          F     G
Da da da dum da da da dum
Verse 3:
(E)                 (B)
 C                   G
And long after I've gone
(E)                     (B)
 C                       G
You'll still be humming along
   (C#m)       (B)       (A)
    Am          G         F
And I will keep you in my mind
   (B)                 (E)
    G                   C
The way you make love so fine
Chorus 3:
    (A)             (E) (E7)
     F               C   C7
We may only have tonight
             (A)                (E)
              F                  C
But 'till the morning sun you're mine
(A/C) (C#m)
 E/G# Am
 All  mine
(C#m)    (B)    (A)
 Am       G      F
Play the music low
   (B)                  (E)
    G                    C
and sway to the rhythm of love
Gtr. 1: (It is not easily heard, but this is played on the last line as it was in the choruses, however it ends on the open G and leads into the Am below)E-----------------------------------------|B-----------------1-1-1-1-1-1-------------|G--0---0----------0-0-0-0-0-0--0---0------|D----3---2--------2-2-2-2-2-2----3--------|A-----------3-----3-3-3-3-3-3-------------|E-----------------------------------------|
(C#m)    (B)   (A) Am       G     FPlay the music low    G                    CAnd sway to the rhythm of love(Once again, begin to play this on the word "rhythm")Gtr. 1:E--------------------------------------------------------------------------|B-----------------1-1-1-1-1-1-----------1-1-1-1-1-1------------------1-1-1-|G--0---0----------0-0-0-0-0-0--0---0----0-0-0-0-0-0---0---0----------0-0-0-|D----3---2--------2-2-2-2-2-2----3---2--2-2-2-2-2-2-----3---2--------2-2-2-|A-----------3-----3-3-3-3-3-3-----------3-3-3-3-3-3------------3-----3-3-3-|E--------------------------------------------------------------------------|
E-------------------------|B-1-1-1-3-1~--------------|G-0-0-0-0-0~--------------|D-2-2-2-0-2~--------------|A-3-3-3-2-3~--------------|E-------3-----------------|
Gtr. 2: (Capo 4)E--0-----0--------0-0-0-0-0-0--0-----0--0-0-0-0-0-0---0-----0--0-0-0-0-0-0---|B----0-4----------0-0-0-0-0-0----0-4----0-0-0-0-0-0-----0-4----0-0-0-0-0-0-4-|G-----------------1-1-1-1-1-1-----------1-1-1-1-1-1------------1-1-1-1-1-1-4-|D-----------------2-2-2-2-2-2-----------2-2-2-2-2-2------------2-2-2-2-2-2-4-|A-----------------2-2-2-2-2-2-----------2-2-2-2-2-2------------2-2-2-2-2-2-2-|E-----------------0-0-0-0-0-0-----------0-0-0-0-0-0------------0-0-0-0-0-0---|
E-0~-------------------------|B-0~-------------------------|G-1~-------------------------|D-2~-------------------------|A-2~-------------------------|E-0~-------------------------|
Gtr. 3: [no capo] (This comes in during the second and third choruses)E-------8------------6-----------4-----------6---------|B-----9---9--------8---8-------6---6-------8---8-------|G-10--------10--8--------8--6--------6--8--------8-----|D------------------------------------------------------|A------------------------------------------------------|E------------------------------------------------------|
Gtr. 3: Post-ChorusE----8----8----8----6--------|B-----9----9----9-----8------|G--8----8----8----8-----8----|D----------------------------|A----------------------------| Repeat 2X on the 2nd chorus and 3X on the 3rdE----------------------------| chorus and end the song with:
Gtr. 3:E--6-8~----------------------|B--8-9~----------------------|G--8-8~----------------------|D----------------------------|A----------------------------|E----------------------------|
Gtr. 3: Bridge (This begins where he says "and all your tears will subside.."E--4---4----4----4----6----6----6----6---------------------------|B----6----6----6----6----8----8----8----8------------------------|G-----6----6----6----6----8----8----8----8-----------------------| 2XD----------------------------------------------------------------|A----------------------------------------------------------------|E----------------------------------------------------------------|
And that is all. There are some parts that I'm still a little unsure about, but I'm confident
it is mostly correct. If you have any questions or corrections, please message me.