This song is originally played on a ukulele but a capo on the 6th fret of a
guitar is standard uke tuning with a bit more of a full bodied sound.
The chords are:
E|-| A2|-| B|x|
 |-|   |2|  |4|
 |1|   |2|  |4|
 |2|   |2|  |4|
 |2|   |-|  |2|
 |-|   |-|  |-|

Verse 1:

      EIm (022100@1)in trouble

I'm an addict

I'm addicted to this girl
            AShes (x02220@1)got my heart tied in a knot

And my stomach in a whirl
         EBut (022100@1)even worse I can't stop calling her

She's all I want and more
       A (x02220@1)                BI (x2444x@1)mean damn, whats not to adore?

          EI've (022100@1)been playin' to much gee-tar

I've been listenin' to jazz
  AI (x02220@1)called so many times I think shes goin mad
         EAnd (022100@1)that cellular-er will be the death of us
  A (x02220@1)      BI (x2444x@1)swear, I swear

*Here he mutes the strings and strums the rythm is 1...1,2..1,2,3 The rythm is the same 
the chorus

And oh oh oh oh oh oh oh
AOoooh (x02220@1)Oooooh

Chorus:
                                 EI'm (022100@1)running my mouth just like I got her
             A (x02220@1)   BBut (x2444x@1)I surely don't

Because shes so-o-o-o-o-o-o
AROCK (x02220@1)AND ROLL!
              EAnd (022100@1)out of my league
                 AIs (x02220@1)she out of my league?
         BLets (x2444x@1)hope not


The rest of the song is the same. This is 100% correct and tabbed by ear I've played it 
with the song many many times.