At 22, the baby-faced Hayes has already established himself as one of country's key players. Enough that he's ready to try something risky. His 2011 self-titled debut was solid, if somewhat safe, but with "Invisible," the first single from his sophomore set, he reveals a layer of vulnerability that's rare for a newcomer in country. "Crowded hallways are the loneliest places/For outcasts and rebels/Or anyone who just dares to be different," Hayes sings as piano and light guitar strumming introduce the ballad. It's very teen, and maybe a touch emo.