New York native Matthew Koma distinguished himself early on, cowriting Zedd’s “Clarity” at just 25. Despite working with the likes of Tiësto, he wasn’t wedded to EDM: RAC’s “Cheap Sunglasses” is sparkling tropical pop, while “Slow Dances”, which Koma recorded as Winnetka Bowling League, is psych-infused indie. Koma’s signature hooks and clever twists of phrase are genre agnostic; witness how well they work on country singer Keith Urban’s “Change Your Mind”.