Lady Gaga has announced that her long-awaited “Apple Music Live: Lady Gaga Mayhem Requiem” will be released on Apple Music on Thursday at 8 p.m. PT/11 p.m. ET, and will also debut at the same time during one-night-only screenings at 15 AMC Theaters in select cities. Directed and produced by Morningview, “Apple Music Live: Lady Gaga Mayhem Requiem” is a filmed live performance of a one-off show that Gaga staged at Los Angeles’ Wiltern on January 14. During the set, Gaga performed an entirely reimagined version of her 2025 album “Mayhem,” which won best pop vocal album at the Grammy Awards this past February. “Apple Music Live: Lady Gaga Mayhem Requiem” is being billed as the “final chapter of her Mayhem era,” according to a release.…