Can anyone tell me which act won America's Got Talent?

[MummyPenguin]

I used to watch it for half an hour on ITV2 in the break between Big Brother announcing who was being evicted and the actual eviction and interview. As I turned back to CH4 though for BB, before the end of AGT, I never got to see the conclusion. I saw most of the acts though, and have wondered who won.

Bianca Someone (the girl who sang with no shoes on!!)

Thanks for that. There were a few young girl singers.. was she the mixed race girl with wild hair? I think that's her. Or the one that Piers said he didn't like her dress and thought her hair was old fashioned. (She was 11 !!!!!)