The mom-of-one also shared a sweet glimpse of her son Jack Blues’s Halloween costume.Hailey Bieber attends the 2026 Academy Museum Gala on October 17, 2026 in Los AngelesCredit: Getty ImagesThe GistHailey Bieber unveiled a moody new dye job on Halloween.The Rhode maven posed in a white feathered bra and matching wings with husband Justin Bieber.Hailey also shared a glimpse of her 2-year-old son Jack Blues’s Halloween costume.Hailey Bieber unveil…