Scarlett Johansson looks pretty at the photo call for her new movie Iron Man 2.Scarlett Johansson at the Hollywood premiere of Iron Man 2 in an asymmetrical Armani Privé organza lame cocktail dress from the “Moon” collection. "I wanted to wear something that was fun and maybe a bit of a departure and screamed Iron Man to me. And this was it," she said. "It called to me."Scarlett Johansson's