This is a list of my favorite vocal synth music. I've tried to limit it to one song from each of the following categories per vocal synth, with some exceptions (can you really pick just one Miku or Flower song?).

1. A "high-profile" song is one that has gained wide attention from the fandom, or even from outside the usual listening audience. Not every vocal synth even has a truly high-profile song, so it's a flexible category by necessity.
2. "Under the Radar" means something that tends to be lesser-known, either relative to other songs using the same voice or other works by the artist. Most English songs fall into this category.
3. I didn't only want to list original songs, but I also don't want to only mention a cover for any particular vocal synth, so I've opted to give covers their own category.

Picking single favorites is kind of impossible, so treat this as a recommendation list more than anything.

TLDR: I like *Luna, Aqu3ra, and Inabakumori