Celebrities have shared heartfelt tributes on social media to mark the 21st anniversary of 9/11. See the most powerful tributes from Kourtney Kardashian, ...
[Hailey Bieber](https://www.hellomagazine.com/tags/hailey-bieber/) kept her tribute short, but powerful. Her 9/11 tribute re-sharing a post about the "forgotten" heroes of the attack was a fitting nod to her love for animals. The country singer re-shared a heartfelt post to her Instagram Story to mark the 21st anniversary of 9/11. Weโd like to take a moment to honor the brave people and dogs who were there on that fateful day. The Kardashians star Kourtney reshared a poignant photograph to her Instagram Story taken by Melanie Einzig. The wife of [Justin Bieber](https://www.hellomagazine.com/tags/justin-bieber/) added a photo of the former Twin Towers in NYC, along with the caption: "always remember". She simply wrote: "#september11" over the image. The series of coordinated terrorist attacks against the USA saw two planes crash into the Twin Towers in Manhattan, while a third hit the Pentagon, just outside Washington DC. Celebrities across the globe, including [Kourtney Kardashian](https://www.hellomagazine.com/tags/kourtney-kardashian/), [Kelly Ripa](https://www.hellomagazine.com/tags/kelly-ripa/) and [Tom Brady](https://www.hellomagazine.com/tags/tom-brady/), marked the poignant occasion with heartfelt tributes on social media. [How is the US paying tribute to the Queen?](https://www.hellomagazine.com/royalty/20220909150619/the-queen-how-has-us-paid-tribute-following-death/) [Kelly Ripa](https://www.hellomagazine.com/tags/kelly-ripa/) marked her respect with a poignant photograph shared on her Instagram Story of a brilliant beam of light pouring into the sky from the World Trade Centre memorial in NYC.