I wish him a speedy recovery. I start to worry it's something serious when someone has to cancel appearances in both February and May.
It's also possible that it's an issue with his voice -- it's hard to imagine that a 70-year-old can keep singing with the same voice quality as in the past. When I saw the Les Miz movie, one of the reasons that I concluded that the live singing idea didn't work was that even Mr. Wilkinson sounded shrill and weak. Now, I wonder if that might have been the beginning of an ongoing problem.
The other musical superstar that could be ill is Sarah Brightman. I doubt she'd postpone her trip to space for a trivial reason. I hope that she, too, is ok.
Audrey, the Phantom Phanatic, who nonetheless would rather be Jean Valjean, who knew how to make lemonade out of lemons.