It's part of our human biology to be voyeuristic, isn't it? Well, that's our excuse anyway for pouring over A-list make-up artist and hair stylist Instagrams. For it is there that those in the know find those golden nugget shots of the world's biggest stars; non-staged, spontaneous, with (gasp) unfinished make-up or hair in curlers. 

This is where we find that little chink in the armour of the A-list, bashing down a few more of the walls that exist between us and them. 

Click the gallery to take a surreptitious look at the stars of the stage, screen and catwalk getting ready for the Met Ball red carpet moment.