Yeah I saw that, pretty sure it was channel 4, they shopped her at 3 different levels, like not at all, just a few touch ups and like full on messed around with and then asked the public which one they preferred and stuff.
Youtube Video ->
Original Video
EDIT: Actually it was on BBC 3, Alisha Dixon, Look but don't touch http://www.bbc.co.uk/programmes/b00cgq99 http://www.bbc.co.uk/beauty/?clip=alesha&tab=3