Scarlett Johansson arrived at Moet & Chandon's "Tribute to Film" event in London looking almost goth-like, wearing a black dress, dark lipstick, and sporting very dark red hair. She must be getting into her Black Widow character for Iron Man 2. She's also looking a little thinner these days, which isn't necessarily a good thing.

Sultry Scarlett Johansson is getting rid of her famous curves. Eyes popped Tuesday night at Moet & Chandon's "Tribute to Film" soiree at London's Big Sky Studios when the "very slim" actress, who's married to Ryan Reynolds, strutted in wearing a tight, black minidress. "She was talking to Thandie Newton about the rigid diet she's on," our spy said of the star of the upcoming "Iron Man 2." Joseph Fiennes, Eva Herzigova and Marc Newson were all there and ogling Johansson, who "was really working it," according to our snitch. (Page Six)

While I think Scarlett looks fantastic here, let's hope this is where she draws the line and stops losing weight. I say that for her own good, really. If her cup-size begins to drop, her career could be over. Imagine how many meetings she had with producers where they brought her in to discuss how poorly her latest film performed at the box office, only to send her on her way with a multi-film deal after staring at her cleavage for twenty minutes. Those babies are magical.