My only exposure to her vocals are on Lovano's Celebrating Sinatra. It's my least favorite Lovano disc, and no, it's not a coincidence.
I like her on Lovano's Gunther Schuller album (the name of which is escaping me). Sounds a little like the background vocals on the Star Trek theme, but tastefully done. I'm not sure why I felt compelled to say this. Good way to restart this thread, I suppose.