That's a nice combo.
I listen to Diana Krall on the Jonathan Schwartz show all the time. (usually on NPR radio but also on Sirius "40s on 4" radio). Wonderful singer and musician.
And Natalie Cole is a gifted singer too. She went through a rough patch with drugs in the 80s, but she's really come back and had a nice career.
Her father is one of my favourite singers.