Kendall Jenner

The 27-year-old supermodel doesn't know why she has battled with life-altering panic attacks, but she has tried hard to understand what causes the episodes.

Speaking in 2018, Kendall said: "Where do I even start? Everything is so horrible, it’s hard to name one thing. I just think that the world needs so much love. I wish I had the power to send Cupid around the planet, as cheesy as that sounds. You go online and you see everyone saying the worst things to each other, and it’s hard to stay positive. It’s hard not to get eaten alive by all the negativity."