[rquote=2515381&tid=145341&author=poejoe]Maybe it's to do with black makes you look slim cause the camera adds pounds[/rquote]
Spot on,

here is a Davina comment from BB5.
Like I said the program decide the outfit and colours.
"Davina McCall : Black is my signature colour and that started in year two when I was pregnant with Holly. The Producer basically said I looked fat in any other colour, so it became a theme. "