"Get Lucky", by Daft Punk.
This song is the most self-evident Song of the Year since "Crazy" (and, before that, "Brimful of Asha"). Even when you have heard it so many times that you never want to year it again, you want to hear it again. How did they do that?
Mark my words: in decades to come, you will see balding, slightly paunchy middle-aged MBA upper-middle-manager types dancing (badly) to this song on Friday nights at the Royal South Yarra Tennis Club and other establishments of the Establishment, and you will not even feel any resentment (perhaps the slightest amount of pity) towards them for doing so. If the Berlin Wall were still standing, this would be the song to bring it down [with apologies to Ed Kuepper, who claimed that feat for "Everything I've Got Belongs To You"].