Wow, what a voice -- I tried it on my Mac when I got home and it worked perfectly.
I get the distinct impression she would do well unleashing her power on more powerful stuff, like "Strange Fruit", some impassioned torch or blues, even some select Janis Joplin material. She has a wonderful strength in her voice which shouldn't be wasted on the more whitebread material. This is just my instinctive suspicion, and I could be off the mark hearing so little from so far, so please excuse me if so.