Personally, I find the vocal affectations so many female singers seem to use to be distracting (eg. Diana Krall, Norah Jones, the singers in this video... and most other popular female vocalist I can think of).

I like someone who just sings a song - hits notes and then holds them, without so much vocal athleticism. As an example: Stacey Kent.

This is very much just a personal taste thing - not any kind of hate or anything - but I encourage people to give Stacey a try.