Environment Day equals Stella McCartney's party and that equals celebs fashion night so here are some of my 2 fav looks of the nigth:

First we have Cameron D with a beatiful black and white floral print dress and black hills.

Liv Tyler wearing McCartneys printed sweatshirt dress wiht gray floral or coral like (I don't really know) print on top.

And the beatufil environmental lover setting at the party....