Those One Direction lads have evolved quite a lot in the past few years, haven't they? Whether it's Harry Styles's glorious mop getting curlier than a turkey twizzler, Louis Tomlinson getting stubble or Niall Horan, er, being Niall Horan, it's fair to say they've been changing in front of our eyes.
And so too has their style, and considering you (OK OK, and us) have probably studied almost 99 per cent of their red carpet appearances in great detail, you'd like to think you know the way they dress pretty well, right? RIGHT?
Well prove it, pal. Take our quiz based around who wore what, then give us a Tweet over @Sugarscape to let us know how you did. Y'all ready? LEGGO: