I know these chords are 1000% right because I got them from Mike Doerr (guitarist 
from Cash Cash) himself (:

this is the exact message he sent me:

"its very simple haha here it is 

verse: G - C - Am9 - D 

prechorus: C - D

Chorus: Same as verse

there it is! very simple haha"

this is the acoustic version by the way. check out this vid for the strumming.
http://www.youtube.com/watch?v=0Kyfi0-tXTE

enjoy! (: