Newton native Rachel Platten is scheduled to perform July 1 at Rockefeller Plaza as part of the “Today’’ show’s summer concert series. We last saw the singer-songwriter at Logo’s “Trailblazer Honors’’ awards show (above), when she sang “Fight Song’’ and “Stand by You’’ as a musical tribute to victims of the Orlando shootings. Judging by her recent Facebook posts, she plans to meet fans at The Shop at NBC Studios after the show.