Your 40s are a golden age for fashion . Physically you're not that different to what you were in your 30s (or so I tell myself), but emotionally you have an extra decade of wisdom and confidence.
It might be a moment on the catwalk or a celebrity snapped off-duty that sparks a trend - that lightning-in-a-bottle frenzy which then sees everyone wear a look.
A teasing video was posted on Topshop's Instagram account last month, sending its 12 million followers into meltdown. Two models stood on a rooftop under a 'Topshop' billboard.