Nicole Richie ditched her blonde locks to unveil a new brunette look at her House of Harlow 1960 Holiday Collection jewelry launch at the weekend — and the chocolate locks already has the party girl-turned-serious mom’s I.Q. rising:

“I went brunette. I feel smarter already,” Nicole Tweeted Sunday.

Madonna has been replaced as the face of French fashion house Louis Vuitton by controversial supermodel Lara Stone.

The Dutch beauty, 25, was handpicked for the brand’s spring-summer 2010 campaign by Madonna’s good friend, designer Marc Jacobs. Lara created a stir earlier this year when she graced the cover of French Vogue in “Blackface.”

“After two seasons with such a huge star, Marc decided to take a breather and work with a model – and not just any model. It’s the choice of a new supermodel,” a Louis Vuitton spokesman said Friday.

Madonna has promoted LV in two seasonal campaigns.

Victoria Beckham was too embarrassed to tell Marc Jacobs about her first fashion collection.

The former Spice Girl launched her debut range for her label dVb last year but admits she was terrified to showcase it to her designer friend because she was afraid her talent would pale in comparision to the acclaimed designer’s.

“When I came out with my first collection, I didn’t even tell Marc. Well, I felt a little bit embarrassed. He’s Marc Jacobs,” Beckham told Women’s Wear Daily Wednesday. “What else can I say? I never really told him, and then we went to dinner and he said congratulations on all the reviews and the quality of my work. I’ve learned so much from him. I am such a sponge whenever I’m around him. He is one of the most intelligent, interesting people that I have ever met.”

The pair were married in a private ceremony in Los Angeles last February.

Julia is Lancome’s “Pretty Woman.” Oscar-winning actress and mom of three Julia Roberts has been named the new “ambassadress” for Lancome cosmetics, the makeup brand said this afternoon.

“By her remarkable personality and career, Julia Roberts is an emblematic woman of her time. Her exceptional talent, her radiance and her strong commitments, perfectly echo Lancome’s values. We are convinced she will embody the brand in the most sublime way possible,” Lancome International president Youcef Nabi said in a statement Friday.

Reese Witherspoon, Uma Thurman, and Anne Hathaway have also fronted the collection.

Heidi Klum is back to work — just seven weeks after delivering her fourth child! The catwalk stunner shot scenes for a commercial promoting German haircare product Drei Wetter Taft in L.A. Thursday.