Flavor Wave’s single, “The Optimist,” arrived less like a declaration and more like someone tentatively drawing back a dusty curtain on a grey afternoon. From West Chester, PA, these five lifelong friends – Kyle Loedel (vocals, lyrics), Matthew Stretch (lead guitar), Patrick Blair (rhythm guitar), Noah Montgomery (bass), and Joshua Speaker (performer/drums) – typically tread alternative rock paths nodding to influences like The Strokes....

HollyBear does not sound heartbroken on "OBVIOUS". She sounds like she already checked the receipts, closed the app, fixed her hair, and decided the lesson was expensive but useful. That is the fun of the single. It has the warmth of R&B, the cool posture of jazz influence, and the tiny side-eye of someone who knows exactly what happened. "OBVIOUS" moves with a smile that...