I know it will be hard to take this in any other way than an insult to Kimbra, but her voice always reminds me of:
It's mostly the vibrato and the head voice. I guess it shows more than anything that Katy could be a respectable artist like Kimbra if she a) could write good songs and b) didn't sell her soul. As for Kimbra, I think the clean, pop production undermines her talents and apparently she sounds amazing live (so my friends tell me).
Casey Dellacqua, Jelena Jankovic, Anna-Lena Groenefeld,
Jelena Dokic, Mirjana Lucic, Sara Tomic, Sloane Stephens
Melanie Oudin, Kiki Bertens, Kaia Kanepi, Alison Riske