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...

With "A Piece of Me," Western Australia’s Bailey Perrie offers up a pop rock grenade with the pin already pulled, cleverly disguised as a twisted love song. It thunders forward with a cinematic, arena-ready confidence that makes its raw, emotionally brutalist core all the more disarming. The effect is something like finding a tear-stained diary page taped to the side of a massive firework...