Wow, ya'll are so, SOoooo good! All of you really knocked your parts out of the park. Every time I hear Janice sing I hear something special that I haven't heard before, and this is no exception. Everything here is fab.
Not familiar with other versions the song, but am confident you did it more than full justice. I play it pretty loose with theory on the blues, but I'd label this "Cm blues" and call it a day. Or not, 'cause it makes me feel good, and though that sounds wrong for the "blues", it's really all that matters. Ha!