No Capo (This is how he plays it) 
Tabbed by: Prettygirlswag
Standard Tuning (eadgbe)
Chords Used:
     EA DG BE
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 (320003@1)     CBaby, (x32010@1)I love you
  Am (x02210@1)          DI (xx0232@1)never want to let you go
    G (320003@1)    CThe (x32010@1)more I think about,
    Am (x02210@1)           DThe (xx0232@1)more I want to let you know
     G (320003@1)            CThat (x32010@1)everything you do,
   Am (x02210@1)          DIs (xx0232@1)super fucking cute
    G (320003@1)           CAm DAnd (xx0232@1)I can't stand it

Verse:
Em (022000@1)                AmI've (x02210@1)been searching for
              D (xx0232@1)       G (320003@1) G/f#   Em(Walkdown (022000@1)to Em)
A girl that's just like youuuuuuuu
      AmCause (x02210@1)I know
          DThat (xx0232@1)your heart is true

Chorus:
G (320003@1)     CBaby, (x32010@1)I love you
  Am (x02210@1)          DI (xx0232@1)never want to let you go
    G (320003@1)    CThe (x32010@1)more I think about,
    Am (x02210@1)           DThe (xx0232@1)more I want to let you know
     G (320003@1)            CThat (x32010@1)everything you do,
   Am (x02210@1)          DIs (xx0232@1)super duper cute
    G (320003@1)           CAm DAnd (xx0232@1)I can't stand it

Verse:
Em (022000@1)               AmLet's (x02210@1)sell all our shit,
        DAnd (xx0232@1)run away
            GG/f# (320003@1)  EmTo (022000@1)sail the o-cean blue
            AmThen (x02210@1)you'll know,
        D (xx0232@1)That my heart is true yeah!

Chorus:
G (320003@1)     CBaby, (x32010@1)I love you
  Am (x02210@1)          DI (xx0232@1)never want to let you go
    G (320003@1)    CThe (x32010@1)more I think about,
    Am (x02210@1)           DThe (xx0232@1)more I want to let you know
     G (320003@1)            CThat (x32010@1)everything you do,
   Am (x02210@1)          DIs (xx0232@1)super duper cute
    G (320003@1)           CAm DAnd (xx0232@1)I can't stand it

Verse:
AmYou, (x02210@1)you got me where you want me
           GCause (320003@1)I'll do anything to please you
        EmJust (022000@1)to make it through
     DAnother (xx0232@1)year

AmYou, (x02210@1)I saw you across the room
       GAnd (320003@1)I knew that this is gonna
             EmBlossom (022000@1)into something beautiful.
         DYou're (xx0232@1)beautiful.

Solo:
C G Am F

Chorus x2:
G (320003@1)     CBaby, (x32010@1)I love you
Am (x02210@1)             DI (xx0232@1)never want to let you go
    G (320003@1)     CThe (x32010@1)more I think about,
    Am (x02210@1)          DThe (xx0232@1)more I want to let you know
     G (320003@1)            C (x32010@1)
That everything you do,
   Am (x02210@1)          DIs (xx0232@1)super duper cute
               G (320003@1) CAm DAnd (xx0232@1)I can't stand it.

G (320003@1)     CBaby, (x32010@1)I love you
Am (x02210@1)             DI (xx0232@1)never want to let you go
    G (320003@1)     CThe (x32010@1)more I think about,
    Am (x02210@1)          DThe (xx0232@1)more I want to let you know
     G (320003@1)            C (x32010@1)
That everything you do,
   Am (x02210@1)          DIs (xx0232@1)super duper cute
               G (320003@1) CAm DAnd (xx0232@1)I can't stand it
          G (320003@1)  C (x32010@1) AmD
And I can't stand it
        G (320003@1)C (x32010@1) AmD
I can't stand it

G (320003@1)Hope this helped!