Luke Combs just put Post Malone on blast for wearing counterfeit “Combs” merchandise during one of his performances. Of course, the country singer was feigning being upset when he shared a photo of Malone to his Instagram Stories. In fact, it sounds like he’s more excited that his fellow collaborator would represent him at one of his own shows. The shirt in question features a photo of Combs with what looks like his signature across it. The name “Combs” is written above the photo, with the song title “Beer Never Broke My Heart” below. “Shirt is gas,” Combs writes on social media (that’s a good…