Sept. 5: Though she already has a Grammy in her trophy case, one would assume that Lorde’s best years are still ahead of her. This extraordinarily mature pop diva is, after all, just 17. Still running on the powerful fumes of her 2013 release, Pure Heroine, she makes a late-summer appearance in our area, with Canadian electro-pop duo Majical Cloudz warming up the stage. 7:30 p.m. Mann Center for the Performing Arts, 5201 Parkside Ave., Philadelphia. Visit www.manncenter.org.