British singer George Michael has rescheduled dates of a tour he was forced to cancel when he fell ill with severe pneumonia last year and spent several weeks in a Vienna hospital. The 48-year-old former Wham! frontman will re-start his “Symphonica” tour on September 4 with a new concert in Vienna, where he will donate 1,000 tickets as a thank you to the medical staff who treated him. Michael, who went on to pursue a successful solo career recording hits including ‘Careless Whisper’ and ‘Faith’, will also perform at the Palais Garnier Opera House in Paris. Michael has sold an estimated 100 million records over his career and has a personal fortune valued at around 90 million pounds. But the Grammy Award-winning artist has a history of run-ins with the law, notably in 2010 when he spent four weeks in a British prison for driving under the influence of cannabis.