George Michael has been forced to postpone two concerts after being hospitalised with pneumonia, his publicist confirmed on Wednesday.
The British singer called off his Vienna concert on Monday a mere two hours before it was due to start. He is currently receiving treatment at Vienna's AKH hospital, an Austrian state broadcaster reported, although this was not confirmed due to privacy rules.
Michael was also scheduled to perform gigs in Cardiff this weekend as part of his Symphonica tour.
His publicist Connie Filippello said on Wednesday Michael's upcoming tours in Vienna, Strasbourg, France, and Cardiff will all be rescheduled after the former Wham! star has recovered.
Her statement said future dates "will be provided when available".
Earlier this month the star played a special gig to a star-studded audience which included Sir Elton John, David Walliams and Kylie Minogue. The concert, which was at London's Royal Opera House, raised money for Sir Elton John's Aids Foundation.