Mickey Guyton and Black Pumas will bring ‘fire’ to “CMT Crossroads” tonight and leave viewers better for it during their collaboration on the network’s popular cross-genre series. “CMT Crossroads: Black Pumas & Mickey Guyton” will air 10p/9c tonight on the network. Encore showings are slated for Wednesday, June 15 at 11p/10c and Sunday, June 19……