The 49-year-old singer was struck down by a near fatal bout of the illness while touring in Vienna last December, reported Sun online.
But he was back on stage and in form at Birmingham's LG Arena last night, telling fans, "I'm finally back!"
Michael showed no signs of illness as he danced around the stage, much to the delight of thousands of middle-aged women.
"You could have stayed at home and watched the X Factor tonight. I may be 70-years-old but I can still do it. That might let people on to the fact that I actually watch the X Factor. I only watch it because my boyfriend likes it," he said to the crowd.
He opened with 'Through', and rattled through a number of covers