Post Malone on success, loneliness, and making his audience know they're loved

Last month Nashville shut down its legendary Broadway for Post Malone, one of the biggest pop stars in the world, who would be singing with one of the biggest names in country. "We're shooting a video with Mr. Luke Combs," Malone said. "We're gonna be performing on the back of a semi-truck."

Malone's duet with Combs, "Guy For That," is featured on Malone's new album, "F-1 Trillion." It also also includes duets with other country superstars, including Morgan Wallen, Blake Shelton and Dolly Parton.

Stars like Combs signed up quick for Malone's country album. "I heard he was gonna be working on this thing and I just wanted to be part of it," Combs said. "Big times for country music!"