Kelly Clarkson was battling appendicitis while hosting and performing at the Billboard Music Awards on Wednesday. Just a few hours later, the appendix was removed. "I'm not going to lie," he wrote on Twitter, "It's possible that I broke my tears after the show because of the pain." She flew to her home at the Cedars-Sinai Medical Center, where she had an operation the next morning. "It feels incredible now." Clarkson's decision to act while feeling ill could have been deadly, however.