Princess Caroline of Monaco

Back in the day, she sometimes wore bow ties:









Also, I'm pretty sure I once saw a tabloid photo of her in a shiny satin jacket over a wing tip shirt and bow tie, but it could have been her younger sister Stephanie - the notice was about an old friend of the royal family having passed away and he was the main subject of the pic. The princess was only included to show they'd been somewhat close. Might be worth looking out for.