11 août 2021 · Addison actually shared a series of images of herself rocking that upside down bikini on Instagram and, no surprises here, her 38.6 million Instagram followers ate it up. It's not just Addison who has been rocking this summer's hottest trend, though. Of course Kourtney Kardashian (Addison's BFF, btw), Kendall Jenner and Kylie Jenner have.