The 'Turn Back Time' hitmaker was forced to cancel dates on her 'Dressed to Kill' concert last September after being diagnosed with a potentially fatal mystery virus, but she has now revealed she's made a full recovery. br br She said: "I'm feeling great. br "I'm not dying!" br br The musician sparked worries when she was spotted wearing a cardiac monitor back in October, and a source close to the star has admitted the illness was frightening as it affected her heart. br br The source explained: "She was really flattened by the infection -- it affected her kidney function and threatened her heart. br br "For the first time in her life, she learned how to slow down and methodically build up strength.