PRESS PHOTO BY PAUL WILLISTEINFrom left: Doug LaBrecque, guest soloist; Emma Marhefka, Allen High School student soloist; Ronald Demkee, Allentown Symphony Orchestra Associate Conductor; Christiane Noll, guest soloist, after “One Singular Sensation: A Tribute to Marvin Hamlisch” May 14 concert, Miller Symphony Hall, Allentown. The Pops Series concert, a near sell-out, also included Donna McKechnie