Sam Ostler’s new single, “Lights,” then. It unfolds less like a sudden, intrusive glare and more like the slow, determined burn of a really good stage light finally finding its mark after a prolonged blackout. It’s pop, yes, vibrant and undeniably contemporary as advertised – clean lines, clear intentions. Yet, there’s a certain satisfying heft beneath the melodic uplift, a feeling that these notes...

"Summer Rain" by Kristen Castro comes out at just the right time, like when the storm clouds part and the sun shines through, bathing everything in a soft yellow light. The Nashville-based singer-songwriter has really moved me with this song. It is both highly personal and easily understandable to everyone, like finding an old diary entry that applies to your present situation in some way. Five...