"I was freaking out."

Kelly Clarkson has said that her ovarian cyst burst while she was filming The Voice - just one week after having her appendix rupture on stage. The 'Since U Been Gone' singer said that she was filming an episode of the reality talent show when she felt a sharp pain in her side. She turned to her co-host, Blake Shelton, and knew immediately that something had happened. “Blake was talking to me and all of the sudden, everything he said just went away and I had to grab his arm and I was like, ‘Something is wrong,'" she told PEOPLE. “That was more painful than the appendicitis. It was literally a week after my surgery so I was freaking out! “I was hysterically laughing and crying at one point in the ER like 'What is happening?' I’m great now. I’m totally great now.” Clarkson's appendix had ruptured just one week earlier when she was performing at the Billboard Awards. She said that she continued to sing through the pain because she didn't want to "leave people hanging." Ovarian cysts are fluid filled sacs inside an ovary or on its surface. The majority of ovarian cysts are low level risk and tend to disappear over time by themselves. Others, however, can rupture causing severe pelvic pain and/or significant bloating.