Heaven Sings Along is a Promise Worship single built on a comforting image - that the congregation isn't singing alone, that there's a larger choir backing every line.
The track
A gentle worship single with the kind of melodic arc that lifts gradually rather than climaxing. The image of a heavenly choir joining the earthly one is old worship-songwriting territory, and Heaven Sings Along leans into that lineage rather than trying to reinvent it.