Post Malone looked almost unrecognizable in his latest public appearance, as the musician rocked a suave suit and cowboy hat ...

Post Malone Injures His Ankle in Another Stage ... "I was like, 'I will get him to wear this hat,'" she recalls. "And everybody was like, 'Don't get your hopes up, it's never going to happen.

Bailey Zimmerman left quite the impression on Post Malone the first time they met ... the country singer started the show wearing a Las Vegas Raiders shirt — A seemingly appropriate apparel ...