Every 20 minutes a blonde woman dyes her locks brown leaving her fair-haired friends behind.
OK, I might have made that statistic up, but if you scrutinise the glossies you’ll invariably see a blonde celeb jumping ship as she dusts off her mirror and regains her senses.
So this month Britney went brown, and then Kim Kardashian, who was dark, but went blonde post-baby, is also back to being a beautiful brunette.
Even the fairest of us are tempted by the sultry lure of a cocoa-coloured Barnett and for a variety of very good reasons.
1. Brunettes ooze intellect