I love female blues singers, they sing in the range I play guitar in, I've learned lots of vocal lines in my time. A great song to hear a variety of blues styles is I'd Rather Go Blind, a lot of women have sang this almost, rights of blues passage song. Here are just a few outstanding singers, Etta James Beyonce, Angelina Jordan will be as big as anyone mentioned here if all goes well, I think at this age she has as good if not better singing chops as anyone here. The extremely cool thing is, we get to watch her grow and get better unlike any other great woman artist here thanks to youtube. Here's Angelina at 10 belting the blues like few adults can, At 10 she can do this,,, look out world.