Who was this jazz singer?

Back during last year's (pro?) football season, one of the stations (and NO, I don't remember which one) had a jazz singer performing in the studio during their pregame or half-time show. A couple of songs only, including some great scat. She was probably between 18-30 years old, dressed like a hippie, longer, light-colored hair. I think I remember that she wasn't wearing shoes. She had 3-4 older musicians behind her, seasoned pros from what I could gather.

So the thing is, I thought she was so good, that I assumed I'd be seeing more of her. When I first saw Joss Stone perform, I thought maybe that was her, but I've never heard her sing as hot, and from what I've seen Joss isn't exactly JAZZ.

Any ideas of who I might have seen? I've done web searches, and asked people, but with no results. Help!