Pop superstar Halsey is set to star in upcoming slasher/horror movie, MaXXXine, the sequel to the A24’s X and Pearl. MaXXXine marks Halsey’s second movie appearance following their debut in the crime film Americana. In addition to Halsey, the project features Elizabeth Debicki, Michelle Monaghan and Lily Collins, along with Moses Sumney, Bobby Cannavale, Giancarlo…