Best-friends duo girlpool’s second album often sounds like a fairytale scored by a '90s indie folk band: dreamy, sweet, and deceptively simple. Expanding the sound and vision of 2015’s Before the World Was Big, Powerplant adds bass and drums to the mix without sacrificing the intimacy that makes the sisters’ songs so striking, whether it’s the yawning, anthemic “123” or the hushed intensity of “Fast Dust.”