Johanna Lewis graced the stage of the John Jay High School auditorium last year as Ariel in the school's production of "Footloose."  Now she's under the spotlight at Harvard University as a lead singer in the school's a capella group, The Harvard Callbacks. We checked in with Lewis to ask about her life at Harvard and what she misses about her home in Katonah. A video of her solo is posted with this story. Patch: Tell us about your life at Harvard! Lewis: I am really loving my life at Harvard. I'm busy almost every day and my schedule is filled with school work, extracurricular activities, …