Simply being in attendance in Australia's education system, you know some people at best are just moving their lips and not even in sync with the lyrics. But because you're a contentious redditor here is proof that [not EVERYONE in the country knows it.](https://www.youtube.com/watch?v=EnuaWCRPIzs) Google the other thousand videos that exist, or watch any sporting event live, attend a school recital, remember what it was like in high school, so on and so forth.