Halsey. Araya Doheny/FilmMagic Halsey is going for gold. The “Without Me” singer glittered in a sequined, midriff-baring gold gown featuring hip cutouts as she walked the red carpet at the Los Angeles premiere of her new movie, MaXXXine, on Monday, June 24. Halsey’s retro disco look, complete with big hair, is a nod to the…