Angus & Julia Stone (or "Angus AND Julia Stone") are a brother/sister duo from Australia that craft some great indie pop tracks. You can't help but tap your toes and hum along. No, really, you can't.
I especially like the great "delivery" of both their vocals. Maybe it is just the unique sounding voice of these siblings "“ with Angus on "Big Jet Plane" and Julia on "And The Boys" below (which is also a favourite of mine). Like it a lot, enjoy. - Slowcoustic
Streaming source: https://www.youtube.com/watch?v=yFTvbcNhEgc