6. Selena Gomez Underwent A Kidney Transplant
In September, Selena Gomez announced via Instagram that she underwent a kidney transplant over the summer. The singer has been public about her Lupis diagnosis, but kept the transplant private until she had recovered. In a touching post, Gomez thanked her best friend for donating her kidney for the transplant. This post was also one of the most-liked photos on Instagram in all of 2017.