LONDON - Thousands of flag-waving fans gathered Monday to watch Paul McCartney, Elton John, and other musical royalty celebrate Queen Elizabeth II with a Buckingham Palace concert featuring acts from throughout her 60-year-reign. But the joy was tempered by news that the queen's husband, Prince Philip, was hospitalized with a bladder infection.
Palace officials said the prince, who will turn 91 on Saturday, was taken to the King Edward VII Hospital in London from Windsor Castle on Monday as a precaution and will remain under observation for a few days.
""We all send our best wishes for a speedy recovery," said McCartney.



