I am somewhat intrigued by this whole BB phenomenon and have dabbled in a few variants, the latest of which is The Body Shop's All-In-One BB Cream*.
I think of BB creams as some sort of tinted moisturiser hybrid and to be honest saying 'BB' on the packaging does not mean much to me but I do appreciate new formulations and will happily explore the actual product.
The Body Shop's offering is a light cream texture that has colour-adapting technology, that releases pigments when blended into the skin, supposedly matching your skin colour well.
This comes in 3 shades (01, 02 & 03), and I have the
BB Cream for medium skin tone (02)
It starts off as a light, white-ish cream and once you start blending it the colour changes and blends into the skin.