If you’re the kind of Clairo fan who hangs onto Claire Cottril’s every last lyric, lend a careful ear to the new Brainstory single. Vocals from Massachusetts’ reigning alt-pop savant sweep through “Hanging On,” a breezy slice of the California band’s forthcoming record Sounds Good. Clairo’s coos soften the trio’s already malleable psychedelia, which pools around Cottril’s subtle contributions. Her presence distinguishes the gap between passing a test, and passing with flying colors — making this collab a wise move from Brainstory, indeed. Hear “Hanging On” below.