Her sister sent her my way. Lucky me. Lori Lieberman is not only the writer behind the classic “Killing Me Softly,” she ‘s a singer-songwriter of uncommon sensitivity. And then lucky Lori — friends at the excellent “Concerts at the Crossing” series picked up on my rave, and now she’s performing there, Thursday, 9/25, at 7:30 PM. Where’s Washington Crossing? 40 minutes from Center City Philadelphia, 15 minutes from Princeton and 25 minutes from New Hope. In short, near some of you. For information & tickets, click here.