STAGE

“The Phantom of the Opera� is losing its leading lady, Sarah Brightman, on June 4, one month earlier than expected and a day before the Tonys. Brightman, who was to have stayed with the lavish British musical until the beginning of July, has a concert engagement at the end of June with the Berlin Philharmonic, a spokesman for the show said. She will appear with the orchestra in an evening of music by husband Andrew Lloyd Webber, who also wrote “Phantom.� Brightman will be replaced by Patti Cohenour, who already plays two performances a week.