This is specifically covered in cases like Midler v. Ford, and legally it matters what the use is for. If it's for parody/etc it's completely different from attempting to impersonate and convince customers it is someone else.
Midler v. Ford is a bit different from CahtGPT in that it was about a direct copy of a Midler song for a car ad, not just a voice sounding similar saying different stuff.
