Tina Turner has been forced to postpone two shows in England due to respiratory flu. The March 11 concert at the O2 Arena, the last of five shows in London, has been moved to May 3, and the March 12 gig at the Sheffield Arena in Sheffield has been rescheduled for May 5.

Tickets will be honored at the make up dates while refunds are available at the point of purchase for those unable to make the rescheduled shows.

“Tina always wants to give one hundred percent and has been overwhelmed by the reaction from her UK fans at the gigs last week,” said a spokesperson in a press release. “She regrets this decision to postpone and the inconvenience to all those fans with tickets but wants to make sure each concert she does is memorable for everyone.”

Turner’s next scheduled concert is May 16 at the Palais Omnisports de Bercy in Paris, France.