Lukas Graham comes by his choirboy falsetto honestly: The frontman of the eponymous Danish pop-soul squad grew up singing in the Copenhagen Boys Choir. His buoyant croon is the driving force behind his band's effervescent earworms, adding endearing bashfulness to the loutish swagger on “Drunk in the Morning,” underscoring the romantic pleas on “What Happened to Perfect” with a heartfelt quaver, and supplying earnest gravitas to the grief and introspection on “7 Years.” The latter track, a smash hit back home in 2015, helped propel Lukas Graham's funk-laced R&B onto international stages.