Tropical house’s reigning prince delivers his highly anticipated debut album. Cloud Nine is a shimmering tide pool of warm synths and gentler drops that finds the Norwegian producer pairing up with a wide variety of talented vocalists. While John Legend weaves his way through the moonlit pulse of “Happy Birthday”—a moving tribute to his infant daughter—“Oasis” combines a cloud-parting piano melody with UK singer/songwriter Foxes’ soaring voice.