Sometimes, the Style Superstar honors we bestow on the fashionable dames of Hollywood come with a wild twist: a starlet who starts out slow on the fashion front, but then comes back the next day with an outfit that's pure perfection. And get ready, 'cause it's one of those weeks! Today, our style MVP is also the week's MIP (that's "most improved player," for the uninitiated), thanks to her fabulous followup to an earlier not-so-great attempt. Who are we talking about?

It's Rooney Mara, of course--who was ubiquitous this week during the multi-continent premiere events for "The Girl With the Dragon Tattoo." Rooney has been channeling Lisbeth Salander in a major way with her style choices for the various premieres, sticking strictly with basic black or white and opting for unexpected silhouettes with cut-out accents, echoing the distressed gothic aesthetic of her wardrobe for the film. Call it "Lisbeth Couture"! But at first, it wasn't quite working: at the Stockholm premiere, her Roksanda Illincic jumpsuit was wrinkled, overlarge, and waaaaay too long (although none of this stopped Rooney from donning some gorgeous crimson lipstick and laughing it up adorably with Stellan "Father of Alexander" Skarsgård).

But just one day later, Rooney had gotten her haute Lisbeth look down to a science, showing up to the New York premiere in a daring Prabal Gurung dress with surprising lines and lots of sheer netting. It's a terrific choice--flattering and interesting, showing off her long limbs and with angles that echo her sleek, cropped hair. And with bold lips, minimal makeup, and pale skin peeking out in all the right places, this look was a shoo-in for style superstardom. Also, the shoes! And the back! OMG THE BACK.

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How do you like Rooney's looks from this week? Tell us in the comments and on Twitter!