Charlize Theron showed off her dramatic new 'do in South Africa on Friday. (Esa Alexander/Sunday Times/Gallo Images/Getty Images)

Hollywood A-lister Charlize Theron made headlines back in June when she shaved off her long blond tresses in favor of a buzz cut for her role in the upcoming sequel, "Mad Max: Fury Road." But fans haven't gotten a good look at her dramatic 'do up until now, since she hasn't been spotted in public all that much, probably because she spent the summer shooting the film in the African country of Namibia. And the few times she has been seen out and about, her shorn locks have been hidden under hats.

Charlize Theron vs. Kim Kardashian: Fashion Faceoff

Over the weekend, however, Theron, currently one of Hollywood's best-known blond bombshells, proudly debuted her new look, which isn't just super short, but also surprisingly dark. It appears that the color is the 37-year-old's natural hue … and that it's going to be quite a while before she can return to her old style. But if anyone can pull off the buzz cut, it's the 5'10" former model.

Jessica Biel (Jim Spellman/WireImage)Jessica Biel is apparently still so focused on her recent marriage to Justin Timberlake that everything else — even her wardrobe — is an afterthought. How do we know? The brunette beauty, who wed JT in Italy on October 19, donned a disappointing silver tunic and pants set by Oscar de la Renta better suited for one of the "Golden Girls" than for a stylish 30-year-old actress as she hit the red carpet with her "Hitchcock" co-stars Scarlett Johansson, Helen Mirren, and Toni Collette, and others at the movie's premiere on Sunday at the Ziegfeld Theatre in NYC. Mrs. Timberlake, who was without her new pop star-turned-actor hubby for the evening, accessorized her sequined design with Lorraine Schwartz jewels and Manolo Blahnik heels. She pulled her hair back into a ponytail, and, of course, wore a big newlywed smile!

Few women have the audacity to step out in a dress worn by one of the most fashionable characters in movie history. But that's just what the uber-confident Rihanna did when she wore the same iconic Calvin Klein slip dress that Cher Horowitz, played by Alicia Silverstone, memorably wore in the 1995 teen classic "Clueless." So did RiRi manage to make the look her own? Time for a '90s flashback edition of ... who wore it best?!

Rihanna on the red carpet (Splash News)Alicia Silverstone in Clueless (Everett Collection)

Ben Affleck (Sebastian Kim/GQ)

When Ben Affleck broke onto the scene in 1997's "Good Will Hunting," fans couldn't get enough of his success story, lapping up all the details of his friendship with Matt Damon and how the two childhood friends from Cambridge, Massachusetts, went on to become the young toasts of Hollywood. But just a few years later, Affleck made a string of really bad movies ("Gigli," anyone?) and on top of that he started dating Jennifer Lopez in 2002. The celebrity coupling was greatly disdained and widely criticized, which is something that still bothers Affleck a decade later. In fact, in the latest issue of GQ, he says the treatment he received from the press at the time was worse than what was being said about convicted murderer Scott Peterson.

Brown. (Maury Phillips/WireImage)Chris Brown better start practicing his "Blue Steel" face. The "Don't Wake Me Up" singer has been signed as a model with mega-agency Wilhelmina — which also has celebs like Jessica Simpson, Beyonce, and Britney Spears on its roster. According to Women's Wear Daily, Brown plans to expand his modeling duties into creating his own fashion and beauty endorsements … because who doesn't think of Chris Brown when they think of beauty and fashion?

Keira Knightley (Mario Testino/Allure)Keira Knightley doesn't mind showing some skin — whether it's for a scene in one of her movies or the cover of a magazine.

The British actress goes topless on the December cover of Allure. Wearing Tom Ford tuxedo pants, which are unbuttoned, and a black sequined Chanel jacket, the 27-year-old appears as confident as ever as she strikes a pose for famed shutterbug Mario Testino. However, she says she has her limits when it comes to nudity.

Snooki's a little fireball. (Instagram)Nicole "Snooki" Polizzi is now officially a red-hot mama. The "Jersey Shore" star transformed herself from a brunette into a fiery redhead on Monday with the help of NYC stylist Bradley Moreland. And she clearly loves the new look based on the multiple photos of her 'do she has posted on Twitter and Instagram. In fact, she already made one her profile pic on the photo sharing social network!

Taylor Swift (Paola Kudacki/Harper’s Bazaar)Over the weekend we saw more va-va-voom than usual from Taylor Swift. On the red carpet at Sunday's MTV Europe Music Awards, the country crooner dazzled in a low-cut J. Mendel dress with diamond-shaped cutouts at her midsection. The look was a departure from the largely conservative dresses we've seen her wearing lately, which have been much more buttoned up, a style she says she embraces.