The rock icon took to Instagram on Thursday to share a health update after cancelling her Tuesday performance in Bologna, Italy as a result of a "sudden illness". "This is thanking all at the hospital for their help and guidance. I am so sorry that we had to cancel concerts in Bologna and Venice. I will return to fulfill my happy obligations. This is also to thank all the medical teams globally, who attend to the people's needs, especially those altruistically serving under fire, all healers, physicians, nurses, attendants…”