click image to see 83 pictures of Ida Cox
I think this video shows how gospel music has its roots in the blues, and also how the blues got some of its power from gospel singers. Ida Goodson is a very good example of a blues musician who lived in both worlds.
You can read all about her at Wikipedia, they have a nice write up on her.
This is in my mind a perfect example of how blues and gospel music are related from the mouth of someone who would know.
Here is an mp3 of the roliking Something has got a hold on me from the Music from the Florida Folklife Collection.
I also enjoyed this write up in the Piney Flatwoods Girl blog.
A book at Amazon.com that mentions Ms. Goodson is;