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Julia Roberts may have dropped the F-Bomb on Tom Hanks at this week’s Film Society of Lincoln Center Gala Tribute honoring the actor, but that wasn’t the only way she kept things colorful. The Pretty Woman looked elegant in her Dolce & Gabbana dress and Me&Ro earrings — except for a light pink streak at the nape of her neck that’s had us puzzled for months. And she finally shared with us what it’s all about. “It’s been there since last October,” Julia told PEOPLE.com on the red carpet, explaining that she added the streak simply because, “My kids like it!” And it looks like she may have started a trend. Costar Adrien Brody turned up at the event with tufts of blue hair at the back of his coif. “I did a car race recently,” he explained. “They were my racing stripes.” Tell us: Would you ever change-up your look by adding a little vivid color to your hair? –reporting by Jeffrey Slonim

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Celebrity hairstylist Sally Hershberger has coiffed just about every celeb you can name — including everyone from former First Lady Hilary Clinton to Tom Cruise, John Mayer, Julia Roberts and Lindsay Lohan. But that doesn’t mean there aren’t still a few stars left that she’d love to get her hands on. PEOPLE caught up with Hershberger at the grand opening of her new L.A. salon, where she dished about her dream clients, starting with Mad Men’s retro-beauty January Jones. “She’s so gorgeous,” said Sally. “I love that whole Catherine Deneuve/Grace Kelly thing — but I want to do her in a modern-day vibe.” And another another famous blond she would style a little differently? “I love [Madonna's] long hair, but I felt like it kind of pulled her face down,” she says of the performer’s recent show in N.Y.C. “I don’t want to put her down because I love her. I would just love it a little smoother and a little more hot.” Hershberger, who also has her own line of hair products, Supreme Head, feels that the key to sexy hair is keeping things looking natural by using just a little bit of product. “You don’t want to see the product in the hair,” she says. “That’s the biggest mistake. You want to be able to run your hands through someone’s hair and have it just look sexy whatever way they move it.” — Jed Dreben

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All eyes were on the Pretty Woman as she introduced the legendary Dave Matthews Band at the Stand Up For A Cure Concert Series in New York. Julia Roberts may have made a strong political statement in her Obama T-shirt, but she also made quite a style statement with her sparkling Me & Ro 18K Gold Right Turning Conch Amulet. The shiny necklace is engraved with The Right Turning Conch that symbolizes the endless spread of the Buddha’s teachings. The conch is one of the oldest ritual objects and stands for femininity and as a musical offering. Julia’s is on a custom-made 19 inch chain, but you can get your hands on a similar one in a different length at meandrojewelry.com MeandRo.com for $1,880.

Courtesy Emporio Armani; Chris Polk/WireImage

In support of a cure for the worldwide AIDS epidemic, Julia Roberts has turned designer. The star teamed up with close friend Giorgio Armani to produce a special bracelet through (PRODUCT) RED, the Bono-led charity that supports the fight against AIDS in Africa. The chic leather bands are embossed with a symbolic tree of life and the words “Revolution-Evolution-Devotion,” an acronym for RED. Available in two exclusive colors, brown for men and red for women, the live-saving bands go on sale today in recognition of World AIDS Day. Snap one up exclusively at emporioarmani.com and join the fight for a cure.

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Julia Roberts may be living the life of a happily married mom of three, with her youngest son arriving only four months ago, but she can still light up a red carpet like no other. It’s been quite a while since we’ve seen Julia glammed up, but she turned out to accept the 22nd Annual America Cinematheque Award in Hollywood on Friday looking better than ever! From her red curls to her flawless skin to her beautiful Cathy Waterman jewels to her sophisticated black Diane von Furstenberg gown, the actress looked every inch a movie star — and we’re delighted to see her back out on the red carpet.

Get a Diane Von Furstenberg gown like Julia’s, $582 at yoox.com

Our favorite Pretty Woman was born on October 28, 1967, so today she is 39! We have a few thoughts on what gifts to get her, you know, if we had unlimited budgets and were actually friends with her. Anyone who fits those qualifications, feel free to crib from us! (Danny, we’re talking to you.)

1. To protect her famous pout, we would give her a Lip Balm from Laura Mercier, her go-to makeup artist. And for her famous locks, how about Charles Worthington Dream Hair products? (Bonus: the beautiful bottles will look great in her bathroom).

2. For the activist side of her, we would give her the adorable and all-organic Nature Girl Products. And since she has been involved with Unicef for several years, she would love the currant-scented Bond No. 9 Scent of Peace, which donates a percentage of its proceeds to the organization.

3. October babies have opal as their birthstone, so how about this David Yurman Pink Opal Spiritual Bracelet, which donates 20% of its proceeds to Breast Cancer charities.

4. What if Julia wants to give a preview of her performance as the voice of titular Charlotte in the new live action movie to her twins, Hazel and Phinnaeus? She should have a copy of the childrens’ classic Charlotte’s Web handy. And if she’s not up for reading, they can always pop in the orginal animated version.

Got any great birthday gift ideas for Julia Roberts? Let us know

Photo: Jason Merritt/FilmMagic