If I'm not wrong, Sigourney Weaver was photographed by Helmut Newton in 5 different occassions:
-Los Angeles, 1983
-The Blond Wig Session, 1987
-Alien 3 Session, 1992
-Death and the Maiden Session, 1994
-Alien Resurrection Session, 1998
I have to say I really love all this photographs, especilly the ones from Los Angeles 82, 1987 and Alien 3.
I'm trying to find good copies of them, mostly from magazines, but it is hard to find them without text on them. These are the ones I've found from the Alien 3 session so far, hope you like the collage: