With some of Hollywood’s biggest bombshells making cameos at Comic Con 2010, the film showcase has been an action hero-loving nerd’s dream come true. Angelina Jolie kicked things off last week, touting her new thriller Salt in a curve-hugging black leather ensemble. But she was promptly one-upped by Blake Lively, whose nothing-left-to-the-imagination cleavage shirt definitely upstaged her Green Lantern co-star Ryan Reynold’s entrance at the movie’s press conference on Saturday. Reynolds should be used to that, though; his real-life female counterpart, Scarlett Johansson, frequently steals the spotlight—as she did last night on day three of the festival, debuting a new, choppy angled bob in support of the first installment of the Avengers franchise, for which she takes on the role of the Black Widow. (A requisite décolletage-bearing bustier top was also in full effect). What do you think of her new crop?