I only heard this song for the first time very recently, but it has been on extremely heavy rotation ever since. Courtney Barnett is a Melbourne singer/songwriter who is apparently just beginning to make waves over there. She released an EP last year, called "I've Got A Friend Called Emily Ferris", which is well worth a listen. This new single, though, which is apparently going to feature on a new EP this year, is a real step up. Hopefully she'll make it over to the UK at some point.
It has a very Pavement-y slacker vibe but lacks a lot of the laziness that ruins a lot of that kind of thing. Dan Luscombe, from the Drones, plays guitar on this song and definitely adds a bit of punch that was missing from the debut EP. Fundamentally, the song is just an incredibly catchy pop song, in the very best way that phrase could be used.