Fan-album "Moon" & the early Ayu

[Melrose]

So I've downloaded the fan album "Moon" with a lot of old Ayu songs, but she doesn't sound like herself at all in the songs! Not that she sounds young or anything, but just like an entirely different person. And she doesn't look like Ayu at all on the cover either. Well, a little bit. But just a little. Did she go through some huge plastic surgery that changed her voice as well?