Capo: 2nd fret
This is not a normal Gadd9. Read the bottom of
the page it looks like a G/D but modified to
produce A G.

D
My oh my, you're so good looking
       Gadd9
Hold yourself together like a pair of bookends
    A
But I've not tasted all you're cooking
   Gadd9
Who are you when I'm not looking


D
Do you pour a little something on the rocks
      Gadd9
Slide down the hallway in your socks
     A
When you undress, do you leave a path
      Gadd9
Then sink to your nose in a bubble bath


D
My oh my, you're so good looking
       Gadd9
Hold yourself together like a pair of bookends
    A
But I've not tasted all you're cooking
   Gadd9
Who are you when I'm not looking


         E             Gadd9          D
I wanna know, I wanna know, I wanna know


D
Do you break things when you get mad
      Gadd9
Eat a box of chocolates cause you're feeling bad
       A
Do you paint your toes 'cause you bite your nails
   Gadd9
And call up mama when all else fails


D
Who are you when I'm not around
       Gadd9
When the door is locked and the shades are down
     A
Do you listen to your music quietly
    Gadd9
And when it feels just right are ya thinking of me


         E             Gadd9          D
I wanna know, I wanna know, I wanna know

D
My oh my, you're so good looking
D
But who are you when I'm not looking

_____________________________________
[Thanks to Robert Bradley for tabs]

as Modified by HarryHeck

Based off of the video he is clearly playing
(what www.all-guitar-chords.com/chord_name.php calls)
a G major add 9, or a B minor 7th sharp 5th in relation
to stardard tuning without the capo.

Here is a description and diagram of the chord played
in the video. The capo 2nd fret equals o, open or "fret 0".

/// 1st finger 1st string 3rd fret              \\\
/// 2nd finger 3rd string 4th fret              \\\
/// 3rd finger 6th string 5th fret for the add9 \\\
/// or thumb on 3rd fret for a G major          \\\
/// 4th finger 5th string 5th fret              \\\
/// the 2nd and 4th strings are played open     \\\

 | | |1|-|-|
o|-|-|-|-|-|
 | | | |2|-|
o|-|-|-|-|-|
 | | | | |4|
 | | |T|-|3|

This should make it easier to figure out the
pluck pattern used in the song.

The Actual chord played is an "A add9" for the purists
who hate capo chords transcribed in relation to E.

Also the version by Robert ended on G and the video
ends on D major.