Who sings / what's the name of the True Blood character trailer song?

Ok here goes there are 2 types of character trailers for True Blood.
The first one features all the cast members and the song is The
Trouble Blues By Sam Lightning Hopkins. The second type of character
trailer is the individual ones. They all have they same song just
different portions of the songs. Here are some links to the different
characters: http://youtu.be/VygySWQYbUI http://youtu.be/kbCb4751gZU
http://youtu.be/YI0cb1zeVnM http://youtu.be/fzfM-metic0. Some of the
lyrics are "You can blame it all on me, Yeah I know I done wrong, but
don't leave me alone, cause babe if your gone, I can't go on." Please
help. I can't find this song anywhere and it is driving me CRAZY!