Singer George Michael has postponed four shows after falling ill with pneumonia.

According to an item on Michael's official website, a planned concert in Vienna on Monday and another in Strasbourg on Wednesday have been postponed. Two shows scheduled for Sunday and Monday in Cardiff, Wales have also been pushed back.

“With great regret, George Michael has been forced to postpone his November 26 and 27 shows in Cardiff, Wales, due to his ongoing illness,” the statement read.

“George was recently forced to postpone tour dates in Vienna and Strasbourg under doctor's orders after being diagnosed with pneumonia. He is currently receiving treatment.”

The 48-year-old Michael announced his new symphony orchestra-backed tour in May during a press conference at London's Royal Opera House. He also announced he would be recording a new album during breaks on the tour.

Earlier in the month, media speculation over photographs of Michael with boyfriend Fadi Fawaz in Venice prompted the Faith singer to reply on Twitter: “Before I hit the hay thought I might remind the media that my 'new man' is in fact the same man they photographed me with at Nobu … in 2008!”