First tab :)
The whole song is basically D A Bm G
But here's an example of when to change.
For the rest of the verses just listen to the song and you'll pick it up pretty easy :)
I'll put a message in a bottle and I'll throw it across the sea
Your the lock and included is the key
Along with a dozen x's and o's
Lord knows that you can't get enough of those
Your superkalafragelisticexpialadociously cute
Sweeter than a 12 pack of juicy fruit
Surreal, but I know this isn't a dream
We go good together just like coffee and cream