Some songs are so brilliant, iconic and untouchable that the thought of any other artist covering them is pure sacrilege. Imagine anyone thinking they could do justice to, say, Smells Like Teen Spirit or Chop Suey!. Anyone who has tried soon realises that their interpretations simply aren't a patch on the originals. At the same time, there are some songs that so brilliant, iconic and untouchable that – unbeknownst to many – actually are cover versions. Often, those are also the versions that made the song famous in the first place, so it makes sense that people think those artists wrote them. Even decades down the line – and in the age of Google, where information about almost anything can be found with the click of a button, some people still don’t know that The Clash didn’t write I Fought The Law, that Led Zeppelin didn’t write Dazed And Confused and Iron Maiden didn’t write The Number Of The Beast. Just kidding on that last one, obviously. But how many of these did you know weren’t originals?