So, thinking back to some Kiwi artists, one of the bands of love out of New Zealand is Opshop. (actually British/Kiwi/Aussie terminology for a thrift store if you're interested).
Anyways, the first time I heard Opshop was actually in a New Zealand post commercial. It actually brought tears to my eyes, and watching it again after so long did again!
The song is "One Day".
If you're interested in the other two commercials in this campaign click here and here. They're all fab and touching!