This song was released as part of a side project called the wedding band. 
It's on youtube if you need to listen to it.

CAPO 5

Intro: G C G C G D (x2)

                  G
Well I take your hand 
      C    G        C       G     D
Inside my hand, and hold it tight tonight
               G                    C     G
We've made mistakes, and we've known troubles
          C          G     D
But we'll leave them all behind

CHORUS:
C  D    G
So Mary Jean
C        D     G
Will you be my queen

               G
And bless our friends
          C  G            C           G          D
Who stand by us, and will share this joy with us first
              G          C    G
Let them stay rich, in their kindness
          C         D     G
'Cause we know what it is worth


C  D    G
So Mary Jean
C        D     G
Will you be my queen
C     D           G
So my girl I love everything you do
C       D         G
You and me make a pretty fine pair too
C           D        G
And I would do about anything for you
         D
So let's dance, till' this whole night is through


Intro (x2)


C  D    G
So Mary Jean
C        D     G
Will you be my queen
C     D           G
So my girl I love everything you do
C       D         G
You and me make a pretty fine pair too
C           D        G
And I would do about anything for you
         D
So let's dance, till' this whole night is through


Intro (x2)


                G
What would they say
                C       G           C           G         D
What would your parents say if they heard those whispered words
            G             C    G
But you are more you are more than
    C           G      D
The whole world I once knew

C   D    G
Oh, Mary Jean
C        D     G
Will you be my queen
C     D           G
So my girl I love everything you do
C       D         G
You and me make a pretty fine pair too
C           D        G
And I would do about anything for you
         D
So let's dance, till' this whole night is through

(Play Intro to end)