That makes it weird, but it doesn't (itself) mean they literally used her voice. It just means they were inspired by the movie. It's not illegal to be weird.
Actually, you probably can.[0]
[0] https://casetext.com/case/waits-v-frito-lay-inc
Edit: Added the context for the reply
If it was just an actor, it might be a case of inspiration gone awry. But this particular actor sued Disney in 2021 after making a lot of movies and a lot of money making movies for them.
Deliberately poking a fight with a litigation happy actor is weird. Most weird is really benign. But this is the kind of weird that forces out of court settlements. It’s reckless.
Edit - mistyped the date as 2001. Changed to 2021.
This isn't some college kid with an idea and too much passion.
It’s really a shame.