instead of {G, Em, C, D}, if you want to play it in the key the song was originally recorded in,
you should play {F, Dm, A#, C} instead. But this was way easier for me as a beginner and i didnt have to 
totally cheat and truly change anything, because these are just the same chords transposed twice.

G                  Em
Rootbeer floats, banana boats?
C             D        Em
Gelati and sorbet are hard to resist
                D?
What if they didn't exist?
    Em                C                D?
For me it wouldn't be easy 'cause you see...


     G         Em?
I'm ice cream crazy,?   
   C                    D
No ifs, ands, buts or maybes
G          Em?
Ice cream crazy,?               
              C                   D    G
'Cause I'm an ice cream ice cream ba -by


        Em
We have colors of the rainbow
      C              D
?From all around the world
        Em                      
?And anything you'd like to try?                
        C                  D
You can have it plain or swirled
           Em               C?
With a pinch and a dash of this and that?         
     Em               C
On a cone it does a balancing act?      
    Em                         C
And oh, ya know it's bound to droop
?D
Yumma Dum Dum it's a triple scoop


    G           Em
?I'm ice cream crazy,?  
   C                    D
No ifs, ands, buts or maybes
G           Em?
Ice cream crazy,?                       
               C                  D    G
'Cause I'm an ice cream ice cream ba -by


Em
Sometimes I just can't decide?  
      C                 D
What flavor I should choose?    
     Em         
So I close my eyes and one, two, three,? 
   C                 D
I know that I can't lose?           
      Em                   C
With a pinch and dash of this and that,?                
          Em                  C
Till the cherry on top is an acrobat?
Em                  C
Oh I get carried away
?D
Yumma Dum Dum, just look at that sundae.


*G Em C D* *shoop a-wadda-wadda, etc*
talking:
My darlin' someday if you weigh more that you should?
It's ok?
'Cause I would make your sundae with no fat, low cal, sorbet


     G          Em
?I'm ice cream crazy,?  
   C                    D
No ifs, ands, buts or maybes
G          Em
?Ice cream crazy,?              
              C                   D   G
'Cause I'm an ice cream ice cream ba -by


     G          Em
?I'm ice cream crazy,?  
    C                   D
No ifs, ands, buts or maybes
G          Em
?Ice cream crazy,?                      
               C                  D    G
'Cause I'm an ice cream ice cream ba -by
D7  G     D7sus4 G
Ba -by!    Ba -by!

[you can stick with the D and G on the last two Baby's too, i just really like 
the brightness of the D7 and the resolve of the D7sus4 into the G.]