Song in "Monster in the Box " episode (#157)


Does anyone know what is the title or artist of the song Dr. Barbara Tallman is singing along with when Warrick and Stokes first enter her apartment? It's playing through the door and then they go in. It's kind of jazzy and I really liked it. Any ideas are appreciated! :)
I've not seen the episode, if I had I would know if this is right ;). One of the websites says that Eva Cassidy's 'Wade in the Water' is in the episode, so that could be a possibility. :) I would describe that song as quite 'jazzy' so...

Hope that helps!