On Sunday, ?Havana? singer Camila Cabello was taken to the hospital after her performance at the 2018 Billboard Music Awards. The following day, Cabello tweeted, ?So yesterday after my performance at the billboards, I was feeling really sick and ended up in the hospital to get checked out.? ?They ran a lot of tests and everything is fine, but the diagnosis was basically dehydration and I also have a low grade fever ? the doctors have told me I really have to get rest otherwise I won?t get better,? Camila added.