"He was full of energy. As soon as he got up on that stage, he was keeping up with 20-year-old dancers. He wasn't sitting in the corner looking really ill." Singer/guitarist Orianthi, who was due to perform alongside Michael Jackson during his London This Is It concerts, insists the late King of Pop was a picture of health during his final days. Jackson died from a prescription drug overdose in June (09), just days before the start of his comeback shows in the British capital.