On Sept. 12, during Celine Dion’s first performance in six years, the pop star performed an opera aria. Dion performed “Ebben? Ne andrò lontana” from “La Wally.” The aria was performed during a setlist that includes the diva’s popular songs like “Because You Loved Me,” “Dans un autre monde,” “Courage,” “My Heart Will Go On,” and “It’s All Coming Back to {…}