Ryn Weaver, “Promises”

Ryn Weaver’s iridescent, rippling “OctaHate” is by a long measure the pop song that’s grown on me hardest this summer — listen to that second verse and tell me what other vocalist right now can manipulate the top of her range into growls, squeaks, flutters like that — and her second single “Promises” is full of soft bombast, balancing Sia melancholy and Katy Perry uplift with canny, tightly written verses that remind you she’s a newcomer in the best way possible.