Caccini's Ave Maria by Hayley Westenra

This Kiwi girl from Christchurch has a crystal clear voice with slight vibrato towards the end.

I love the absence of the operatic vibrato in her voice, that many classical crossover artists utilize in their performances, such as Charlotte Church who most people will draw immediate comparisons to.
  
Hayley's spectrum is quite high for woman and her vocal does please my ear and soothe the soul.