This is pretty much an outline to the chords of the song.
I have worked them out from the way they are played when performed on the Five Live 
version on YouTube, look it up and play along to work the rhythm if needed.
You may want to tweak a few things to suit you and add your own swing to it.
Just a tip, this song sounds quite nice when fingerpicked so give that a try.



Standard Tuning.
Capo 1st Fret.
Chords Used- Am / Asus4/ G (Bar Chord)
Tabbed By AshleyColin

Intro-

Am . Asus4 . G (Bar Chord) . Am x2

Am                Asus4                   G
YOUR LATE NIGHT CALLS, YOUR DRUNKEN KISS.
                        Am
OH TO TELL THE TRUTH IM DEFINATELY OVER THIS.
Am               Asus4             G
GO EAT YOUR CAKE, HE'S OH SO RICH.
                        Am
YOU KNOW YOU FEED THE GREED ALL BECAUSE.....

       Am                   Asus4
HE BUYS YOU CHAMPAGNE, I BUY YOU LEMONADE,
               G                  Am
MAKES HIM SOMETHING OF A CASANOVA?
  Am      Asus4    Am        Asus4
MAYBE YOUR RIGHT, BUT FOR TONIGHT...
      G                    Am
YOUR THE ONE IM GETTING OVER.

CHORUS
Am  Asus4  Am  Asus4
JUST TO BE SURE
  G           Am
YOU NEEDED MORE?
Am  Asus4  Am   Asus4
BUT STILL YOU CALL
  G           Am
IM GETTING BORED!
                         Am      Asus4       Am       Asus4
ALL BECAUSE HE BUYS YOU CHAMPAGNE I BUY YOU LEMONADE,
              G                Am
MAKES HIM SOMETHING OF A CASANOVA?

Am  Asus4 Am Asus4
JUST TO BE SURE
   G        Am
YOU NEEDED MORE?

[V2]

[PAUSE}                          G
OH MY GOD! HAVE YOU SEEN THIS GOON?!
                             Am                    Asus4
LOVE HIS 'WALLET' MUST BE HUGE TO BAG A GIRL LIKE YOU.
               Am                  G
BUT I DONT CARE...WELL THATS NOT TRUE,
                             Am
ITS JUST YOU FELL IN LOVE ALL BECAUSE

                 Am  Asus4     Am   Asus4
HE BUYS YOU CHAMPAGNE I BUY YOU LEMONADE,
              G                  Am
MAKES HIM SOMETHING OF A CASANOVA?
             Am    Asus4    Am      Asus4
YOU KNOW ASWELL AS I, THATS NOT MY STYLE....
     G                         Am
GO ON LET ME TAKE YOU HOME GIRL.

[CHORUS]

Am  Asus4  Am  Asus4
JUST TO BE SURE
   G          Am
YOU NEEDED MORE?
Am  Asus4  Am  Asus4
BUT STILL YOU CALL
   G          Am
IM GETTING BORED!
                    Am   Asus4      Am      Asus4
ALL BECAUSE HE BUYS YOU CHAMPAGNE I BUY YOU LEMONADE,
             G                  Am
MAKES HIM SOMETHING OF A CASANOVA?
 Am  Asus4 Am  Asus4
JUST TO BE SURE
   G        Am
YOU NEEDED MORE?

     Am              Asus4
ITS A DILEMATIC SITUATION,
           G                     Am
DO I TAKE YOU HOME AND BITE THE BAIT...
     Am              Asus4
OVER-LOAD ANALYSATION OF LOVE.
           G                 Am
SUPPOSE IM THE MUG FOR YOU.....

[CHORUS]

    Am  Asus4 Am Asus4
JUST TO BE SURE
   G         Am
YOU NEEDED MORE?
    Am  Asus4 Am Asus4
BUT STILL YOU CALL
   G         Am
IM GETTING BORED!
          Am         Asus4          Am          Asus4
ALL BECAUSE HE BUYS YOU CHAMPAGNE I BUY YOU LEMONADE,
              G                Am
MAKES HIM SOMETHING OF A CASANOVA?
    Am  Asus4  Am  Asus4
JUST TO BE SURE
      G       Am
YOU NEEDED MORE?

[Outro]

Am  Asus4  Am  Asus4

    G         Am