Post Malone has announced the line-up for his third annual Posty Fest event.Set to take place outdoors at the AT&T Stadium in Arlington, Texas from October 30-31, the 2021 edition of the festival is the first to take place since 2019 as last year’s event was cancelled due to the coronavirus pandemic.Post Malone himself will headline this year’s Posty Fest, with the likes of Megan Thee Stallion, Lil Uzi Vert, Roddy Ricch, Jack Harlow, Turnstile, Polo G, Rod Wave, Tyga, Iann Dior, Koe Wetzel,