The chords for the verses and chorus are Bm G D F#. I'm not sure about the bridge (I've travelled the world looking for understanding). At the part where he sings in Ukrainian it changes and you play F# Bm F# Bm G D F#. I'm really sorry about the bridge. I love this song too, I wish I knew!
edit: I'm a big fan of GB, if you look at my avatar I have the vodka and marinated herring from American Wedding!
They'll be in my neck of the woods on Friday October 16, Ventura Theater.
This will be their second show this year at the same venue. No one knew what to expect from them the first time around, but the show was so much raucus fun that they had to come back.