During his Grand Ole Opry debut on Wednesday (Aug. 14), Post Malone brought surprises and special guests to the circle. One of those was Lainey Wilson, who hopped onstage with the rapper-turned-country-star to debut their new song, "Nosedive." That song is one of several mega-watt collaborations off Posty's country album, F-1 Trillion, which arrives on Friday (Aug. 16).