At only 16 years old, the daughter of Princess Märtha Louise of Norway and writer Ari Behn – Leah Isadora Behn – is already a budding social media influencer. The young royal’s passion for make-up has helped her garner millions of views on TikTok, as well as thousands of followers on Instagram and YouTube for her creative beauty tips. Here are six things to know about the influencer-royal … 1. She is an heiress of the Norwegian royal family Leah Isadora Behn was born in 2005 as the second daughter of Princess Märtha Louise of Norway and late Danish-born Norwegian…