No Capo (This is how he plays it) 
Tabbed by: Prettygirlswag
Standard Tuning (eadgbe)
Chords Used:
     E A D G B E
G:   3-2-0-0-3-3
G/f#:2-0-0-0-3-3
C:   0-3-2-0-1-0
Am:  0-0-2-2-1-0
D:   x-x-0-2-3-2
Em:  0-2-2-0-0-0
F:   x-x-3-2-1-1

http://www.youtube.com/watch?v=WNgOYfT9taQ this will probably help with strumming 
and what not, though the ending is different from the studio version.

Chorus:
G       C
Baby, I love you
  Am            D
I never want to let you go
    G      C
The more I think about,
    Am             D
The more I want to let you know
     G              C
That everything you do,
   Am            D
Is super fucking cute
    G             C Am D
And I can't stand it

Verse:
Em                  Am
I've been searching for
              D         G   G/f#   Em (Walkdown to Em)
A girl that's just like youuuuuuuu
      Am
Cause I know
          D
That your heart is true

Chorus:
G       C
Baby, I love you
  Am            D
I never want to let you go
    G      C
The more I think about,
    Am             D
The more I want to let you know
     G              C
That everything you do,
   Am            D
Is super duper cute
    G             C Am D
And I can't stand it

Verse:
Em                 Am
Let's sell all our shit,
        D
And run away
            G G/f#   Em
To sail the o-cean blue
            Am
Then you'll know,
        D 
That my heart is true yeah!

Chorus:
G       C
Baby, I love you
  Am            D
I never want to let you go
    G      C
The more I think about,
    Am             D
The more I want to let you know
     G              C
That everything you do,
   Am            D
Is super duper cute
    G             C Am D
And I can't stand it

Verse:
Am
You, you got me where you want me
           G
Cause I'll do anything to please you
        Em
Just to make it through
     D
Another year

Am
You, I saw you across the room
       G
And I knew that this is gonna
             Em
Blossom into something beautiful.
         D
You're beautiful.

Solo:
C G Am F

Chorus x2:
G       C
Baby, I love you
Am               D
I never want to let you go
    G       C
The more I think about,
    Am            D
The more I want to let you know
     G              C  
That everything you do,
   Am            D
Is super duper cute
               G   C Am D
And I can't stand it.


G       C
Baby, I love you
Am               D
I never want to let you go
    G       C
The more I think about,
    Am            D
The more I want to let you know
     G              C  
That everything you do,
   Am            D
Is super duper cute
               G   C Am D
And I can't stand it
          G    C   Am D
And I can't stand it
        G  C   Am D
I can't stand it

G


Hope this helped!