Don't Know How to Keep Loving You has Julia Jacklin’s most layered harmonies.

Probably the chorus. She stacks multiple takes of her own voice — a high, thin falsetto floating over a fuller chest voice, plus a lower harmony that barely moves. It sounds like three versions of her arguing with each other.

The bridge is even more deliberate: she layers a descending melody against her main line, then adds a third part that echoes the last word of each phrase. It’s not just “singing in thirds” — it’s a careful construction that makes the song feel bigger than one person.

If you want a close listen, put on headphones and focus on the end of the second verse. The way her voice splits into three distinct paths right before the chorus hits is the best example.