No matter how majestic or extravagant the occasion, without fail, all the real fun – monstrous gossip, beautification and the cementing of lifelong friendships - happens in the ladies room. And last night’s Amfar, the final metre in the Cannes marathon, was no exception.

After a very undignified stampede of ball gowns and tuxedo’s, Amfar’s after party threw open its tiny doors to the crowds. I, like reams of others, headed for some sanctuary in the ladies. Seconds after having found a little corner to draw on some more black kohl, Lily Donaldson and Rosie Huntingdon-Whiteley whooshed in and headed for the mirrors. 

‘Does anyone have a brush?’ asked Lily franticly, clearly unaware that she hadn’t a single hair out of place. She was duly handed a Tangle Teezer, which prompted Rosie to launch into the story of how the Tangle Teezer was refused investment on Dragon’s Den. This is the sort of trivia that earns big points with me at dinner parties. 

There’s just something quite charmingly reassuring that two of Britain’s biggest ever model exports aren’t too lofty to borrow another’s girl brush in the loo – a bloody amazing brush, it has to be said – and don’t need a hair stylist preening them in a private dressing room all night. 

The following time I went to the ladies, I joined a queue behind a woman in the midst of firing her assistant. ‘This is gonna cost you your jawbbb,’ she growled down her phone. Peaks and troughs. 

Tangle Teezer, £10.99 at John Lewis