The world at large knows Trevor Rosen best as part of Old Dominion, but he's written huge country hits for other artists too. What sets him apart is his knack for real storytelling—blending vivid detail with conversational flow, whether the tale is of a hook-up, like Old Dominion's funky "Hotel Key," or one of love taken to the grave, with The Band Perry's deliciously doomy "Better Dig Two."