There's a curious jolt in hearing a title like "Us Against The World" from an act called The Cockney Cowboy. The name itself is a glorious contradiction, a pairing of gritty East London reality with the wide-open romance of Nashville. You half expect a joke, but what Justin Vella delivers is a dead-serious, straight-shooting country ballad that smells less of hay bales and more...

Love Ghost from Los Angeles and Wiplash from Mexico make the best song about heartbreaks in the digital age. They meet in the neon-lit streets of modern music. "Left on Read," their fiery song, is a pop-punk blast that makes the fear of unread letters audible. This song stands out because of its strong notes and steady drum beats. They make me think of the...