Hair

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Katie Holmes is no stranger to changing up her look, but for nearly a year the star has made shorter hair her signature style — from her banged bob to her pixie cut — and spawned a trend of stars and non-stars alike chopping off their locks. So we could hardly believe our eyes when we saw Katie hit the Valkyrie red carpet in Tokyo just hours ago with lush, full locks that look to be a full foot longer than the bob she’s recently favored. Only time will tell if this was a one-night look or if she’s back to long for a while, but we love that she never stops trying new styles! Tell us: Do you love Katie’s new longer hair? Or should she go back to a shorter look?

Jeff Vespa/WireImage

Gracing magazines is nothing new for Salma Hayek, but now the actress is venturing into literature with an appearance on the front cover of hairstylist Robert Vetica’s book, Good to Great Hair. At Thursday’s Moroccanoil-sponsored launch party for the tome, which offers hairstyles and advice based on hair type, the star, who wrote the forward to the book, revealed what led her to become involved in the project with Vetica, whose other A-list clients include Jennifer Lopez, Marion Cotillard, Mariah Carey, Renee Zellweger and Naomi Watts. “I think it’s great that women can get ideas of what is best for them without having to go to somebody who’s super-expensive like Robert is in real life,” she told PEOPLE. Another famous fan, Debra Messing, said that Vetica encouraged her to love her curly locks. “Every day was an interesting hair moment growing up,” she revealed. “One of the first things that Robert taught me was that it was not a disaster. He was like, ‘Your hair is fabulous and it could do anything!’” she says. Hayek, added, “When he does my hair for an event, the blow-dry lasts for four or five days. I don’t know how he does it, but I have great hair for the whole week once he does it for one day!” But forget hair for a minute, what is the secret to Hayek’s glow? “I am happy,” the newlywed said with a sly grin. Click here to get Good to Great Hair for yourself — and help support one of Salma’s preferred causes while you’re at it. The book’s publisher is donating a portion each purchase towards UNICEF’s efforts to eliminate maternal and neonatal tetanus. – Reporting by Jenny Sundel

Jill Johnson/JPI

There are some trends that just won’t go away! Simon Cowell’s former girlfriend Terri Seymour seems to be staging a one-woman revival of an unlikely candidate: ’80s-inspired crimped hair. StyleWatch can’t decide if we love the look — or think it falls flat. Tell us:

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A hot new Hollywood duo made their debut on Thursday night: former Neil George colorist Tracey Cunningham coupled up with hair and makeup guru Byron Williams to unveil the Byron & Tracey Salon in Beverly Hills (formerly known as the Byron Williams Salon). Host Rachel Zoe brought along a camera crew for her recently renewed Bravo reality show, The Rachel Zoe Project, to capture moments like her hugging former foe Nicole Richie. The stylist flitted around the crowded bash where guests, including Jenny McCarthy, toasted the stylish union with Martini & Rossi prosecco. “I couldn’t dream of a better marriage than Byron and Tracey. They share so many clients and so many friends. It’s like a big party here every day,” Zoe, clad in a sparkly 30s vintage dress, tells PEOPLE. Cunningham, who recently turned Drew Barrymore into a blond bombshell, agrees. “We can barely get them in the chairs because they all know each other and everyone’s friendly.” The colorist, who paints the locks of Cameron Diaz and Lindsay Lohan, adds, “We don’t tolerate, like, hoity-toity people.” Nicky Hilton, for one, digs the salon’s “social” vibe. “You’re always running into your girlfriends, so it’s fun to catch up,” she says. Playing catch-up at the party: Jordana Brewster and Lisa Rinna, who oohed and aahed over Tori Spelling’s hot post-baby bod. “Look at you! Shut up! You just had that baby 7 months ago. You rock!” Rinna gushed to the mother of two. — Jenny Sundel

Entertainment Press/Splash News

Her smile may have been just as bright as ever at last night’s world premiere of He’s Just Not That Into You in L.A., but Scarlett Johansson revealed her dark side on the red carpet with new long dark brown locks. Over the past couple months the star has been gradually going darker and darker, moving away from blonde bombshell look that she made her signature style — and that are played up in her new Dolce & Gabbana The Makeup ads. Tell us: Do you prefer Scarlett as a brunette, or do you miss her old blonde hair?

Courtesy Sexy Hair

Cheryl Burke of Dancing With the Stars and American Idol alum Kellie Pickler are steaming things up as the new faces of Sexy Hair. Ads from the campaign won’t hit magazines until April — but we’re bringing you a sneak peek of the sizzling shots. The gig comes complete with a mega-bucks contract, but, Cheryl reveals to PEOPLE.com, her love of the products is nothing new. “I’m a huge fan of Sexy Hair products,” she says. “The hairstylists use Sexy Hair products on us at Dancing With the Stars, and it gives my hair volume so it moves with me when I dance.” And the star, who will represent Healthy Sexy Hair and Straight Sexy Hair, didn’t always have that famous short do. “I used to have long hair before DWTS,” she says “but I had a coach who suggested I cut it and now I love it. I think it’s kind of become my trademark.” Click here to learn more about Sexy Hair. Then tell us: Does Cheryl and Kelli’s new campaign live up to the brand’s name?

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Everyone feels the need to shake up their look now and then. Selena Gomez skipped the dye, but donned a bright platinum wig for a recent photo shoot in Los Angeles. And why not? All the change, without any of the commitment. Now that we’ve seen celebs try out the look, maybe it’s something we should consider. Tell us: