Bêtes de Mode (Fashion Animals) by Helmo (graphic design duo Thomas Coudred and Clement Vauchez) -- blue portraits + red animal portraits superimposed and displayed in the windows of the Lafayette Galleries on Hausmann Boulevard.
Ron Mueck is phenomenal. Saw an exhibit of his work which included this piece. I was in awe and slightly unnerved by how life-like his sculptures were, down to the detail (veins, hair on body, etc.) and yet out of scale. Image via @ sharla weston: