'I got invisible hair extensions for Christmas - I'm convinced they're a Royal beauty secret'

ok.co.uk:

When the festive season arrives and the parties start, I always wish I could do more with my hair. My locks are long but naturally fine, and they seem to just fall into one 'meh' straight style.

If I even try to create a full head of curls, they go flat within a few hours. So what's a girl to do? This Christmas, I've taken inspiration from the Royals.

Of course, it's only speculation that the perfect-haired likes of Kate Middleton and Meghan Markle sometimes use extensions to achieve their bouncy, voluminous hairstyles because very little is shared about their beauty regimes, but hair experts seem to agree that some hair-boosting is used to quickly transform their tresses.

Obviously, these wouldn't be just any kind of hair extensions; you couldn't have Kate walking around with bonds on show. It's thought that some Royals and A-listers turn to 'secret' or 'invisible' extensions to ensure their hair maintains volume and looks full.