The Henningsens have been playing this one live 
(https://www.youtube.com/watch?v=A7SyBQOpnLY) so I decided to tab it and upload it.
The version without a capo ("original") is played with the chords A, F#m, D, E, Bm and 
G. I tabbed it without a capo, but I think this is easier for beginners. Click transpose 
+2 if you prefer to play the song without a capo.

Capo on 2nd
G  Em  x5

      G        Em            G       Em
What?s this concoction in my glass
     G       Em               G        Em
Well, I?m so glad you finally asked
   C                                  G    Em  G   Em
I promptly think that empty means half full
    G          Em          G       Em
You thought I crumbled in a mess
     G       Em            G      Em
For a while I did I must confess
              C                                        G
You shook the lemon tree and gave them all to me and I fall

Em   D       C
I took out a knife (a sharp one),
Em   D          C
  I gave them a slice (slowly),
Em    D                C          Am
I squeezed them for all they were worth
     C         G    Em   G   Em   G   Em   G  Em
And I made lemonade

  G           Em                G       Em
I pawned your ring and took the green
G            Em      G     Em
Bought a car and gasoline
             C                                           G     Em   G
I drove then to the coast and put my pain and toes in the sand
Em        G       Em             G     Em
And if you wonder how I spend my time
  G       Em           G    Em        C
I finally met a special guy, you play guitar okay,
                       G
But he plays lead in a band

Em   D       C
I took out a knife (a sharp one),
Em   D          C
  I gave them a slice (slowly),
Em    D                C          Am
I squeezed them for all they were worth
     C         G      F    C
And I made lemonade
    G    F  C     G       F   C
Lemonade, oh, lemonade
G   F         C  G        F     C
A little sugar,  a little ice,
G        F       C  G       F    C
A little shaking, goes down nice

Em   D       C
I took out a knife (a sharp one),
Em   D          C
  I gave them a slice (slowly),
Em    D                C          Am
I squeezed them for all they were worth
      C
And I made, yeah
Em   D       C
I took out a knife (a sharp one),
Em   D          C
  I gave them a slice (slowly),
Em    D                C          Am
I squeezed them for all they were worth
     C         G
And I made lemonade