Post Malone was celebrating the grand opening of his Nashville bar Posty’s in style, with a free street concert on Lower Broadway. That show was Wednesday night, and basically shut down the thoroughfare, as 30-thousand showed up. Those that came out saw not only Post Malone, but his special guests, Lainey Wilson and Brooks & Dunn. Lainey joined Post for their duet “Nosedive,” while Brooks & Dunn performed “Brand New Man” and “Neon Moon,” with Malone joining them as a background singer/enthusiastic fanboy.