Easy song - fun to play!
See strumming pattern for intro in the video on youtube.

Intro -
C | G | Am | F

Verse -
C | G | Am | F
(They all said she's just...)

Pre-chorus
G | F | G | F
(I feel so funny deep inside...)

Chorus -
C | G | Am | F
(Sugar high (got to have it really need it to get by))

Have fun!