Megan Thee Stallion at Reading festival in 2022. Photograph: Scott Garfitt/Invision/AP   The open letter from Warner Music, Art on Trial: Protect Black Art, also has Alicia Keys, 50 Cent, and Post Malone as signatories   A group of musicians and leaders in the music business, including Megan Thee Stallion, Coldplay, and Future, are advocating for […]