The podcast Switched on Pop had a fascinating episode[1] last year called 'Invasion of the Vibe Snatchers.' They cite a number of instances where people are assigned songwriting credits on tracks simply because the new song is heavily inspired by an existing song or body of work. To be clear, the new songs are not covers, they don't contain any samples and there's no concrete element of the song that you can point to as being copied. However, taken as a whole, it's clear that the new song is similar to the old one.

I bring this up, because it seems to me that if we live in a legal environment where a song's "vibe" is now de facto copyrightable, there is no way anyone will get away with cloning someone's voice (outside of parody.)

1. https://switchedonpop.com/episodes/invasion-of-the-vibe-snat...