Cameron Diaz is the queen of casual chic. Photo: Getty Images

Kate Hudson and Cameron Diaz seem like the perfect celebrities for summer: blond and breezy, always with a smile, and impeccably casual.

But emulating such seemingly simple style is not as easy as it looks: With the wrong accessories, "Hollywood casual" can become "Hollywood car wreck."

Enter Jeff Goldstein of Blue & Cream, the New York boutique that combines classic WASP style with street twists and serves the sort of young Hollywood crowd normally associated with shopping on L.A.'s Robertson Blvd.

"Cameron Diaz was in the store recently, and she wanted to buy comfortable clothing, like T-shirts and jeans," Goldstein tells StyleList. "On the red carpet, she wears Hervé Léger, but in her personal life she just needs a new pair of jeans for summer, like every other girl."

Besides its online store, Blue & Cream has physical locations in Manhattan's hip, grungy East Village, as well as the immaculately wealthy hamlet of East Hampton, Long Island, exemplifying its high-low aesthetic.

The boutique's name comes from the 1992 rap classic "Glaciers of Ice," in which Raekwon the Chef sings about custom-designing a pair of Clarks shoes: "Any color you want / But it'd be like, blue and cream, yaknowhatI'msayin?"

Hudson buys boots from the store, and other recent shoppers include Russell Simmons (shoes, hoodies), and model Anne Vyalitsyna and her boyfriend, Maroon Five singer Adam Levine (T-shirts and jeans).

"Lindsay Lohan will go on a large shopping spree and spend over $10,000 in one sitting," Goldstein says. "She bought a Phillip Lim leather jacket, and a Hervé Léger bandage skirt for $600, and also a Corto Moltedo handbag."

But what about home shoppers who want to get the celeb look for summer?

"Last year was all about the slouchy boyfriend short, but this summer we're seeing a return to the short-short, cut right below the butt in variety of washes," says Goldstein, who was an investment banker before he gave it up to release his inner fashionisto.

"It's about mixing high and low, so I could see a woman wearing a jean short she cut herself from an old pair in her closet. You would pair that with a little bit more dressed-up top, like something from Iro or a tank top from Phillip Lim."

So that, ladies, is the look of the summer: dressmaking scissors in one hand, credit card in the other.

For another celebrity look for less, go here.