Verse: G|------------------| D|------------------| A|-4~-2~0~----------| E|---------0h2222222| Chorus: G|----------------| D|----------------| A|---------3~-5~--| E|55555555------3~| Post-chorus whistle thing G|------------| D|------------| A|5~-8~-------| E|------8~-3~-| Standard tuning, and once you get the hang of it, you can improvise a bit and put some skill into it.