Saoirse Hanley: They say smart is the new sexy. But if popstars and supermodels are embracing their nerdier sides, what does that mean for the rest of us?

The sexiest people you know are getting smarter, or at least making it look like they are. Gone is the stereotype of the beautiful airhead, replaced by the glamorously erudite stunner. The perfect person to prove this to us is none other, surely, than Dua Lipa.