(CNN) -- Singer George Michael has canceled the rest of his European tour as he recovers from a bout with pneumonia at an Austrian hospital, his publicist and website announced Friday.
His representative, Connie Filippello, had told CNN on Thursday that the singer was "on the mend" and "receiving medication."
Michael's website then indicated that he could not, or had not been able to, perform in four shows on his Symphonica tour because of his condition. Friday's announcement detailed the postponement of 14 shows total, all of them in Great Britain.
A press release Friday from a public relations firm representing Michael dismissed "speculation regarding his illness (as) unfounded and untrue."
"He is receiving excellent medical care," the statement said of the former Wham stand-out. "He is responding to treatment and slowly improving."
The press release quoted two of Michael's doctors -- Christoph Zielinski and Thomas Staudinger, both at the Medical University of Vienna -- as saying Michael "has severe community acquired pneumonia and is being treated as an inpatient."
"From the current point of view, the time until recovery cannot be estimated," the doctors said. "But he will not be able to perform the rest of the tour. Besides medical treatment, complete rest and peace and quiet are mandatory."
Michael previously had postponed shows scheduled for this weekend in Cardiff, Wales, after putting off shows earlier this week in Vienna, Austria, and Strasbourg, France.
He was also a no-show for a London concert scheduled for October 26. That concert is now scheduled for May 2, his website says.
Michael said at the time he had thrown his back out.
Including the kick-off show in August in Prague in the Czech Republic, the singer has performed 45 shows in 35 cities over the course of his European orchestral tour.
Friday's announcement urged fans to hold onto tickets for Michael's postponed shows, adding that "discussions and preparations are underway to (reschedule) dates."