Songs of the summer should be crowned not in the giddiness of July but in the waning days of September, once the hot season has finished its business. A rearview perspective suggests that “Toast,” by ...

Last month, the twenty-two-year-old Jamaican singer and rapper Koffee appeared as a musical guest on the “Tonight Show.” The studio’s stage had been outfitted to look like a casual and haphazard dance ...