I liked this tune from the show and thought I'd try tabbing it. 
You can either whistle or just say 'doo', it's quite cute that way. (: 
Open the first 4 chords with just one strum, then go to up, up, down, down, up. 
Enjoy.

Em7: 022033
E7*: 022103

C               F
  Do, do doo do doo
              Am
Do, do doo do doo
              Em7
Do, doo do do doo
C               F
  Do, do doo do doo
              Am
Do, do doo do doo
             Em7 E7*
Do, do do do do, do do doo
Am           F
Do doo do do do
G
Doo doo doo doo do do do do, doo doo doo doo
D       C       D       C    D    G
Doo do, doo do, doo do, doo, doo, doo.