The fate of the Amy Winehouse collection for Fred Perry is still unclear after the death last weekend of the singer at the age of 27.

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The do-it-yourself trend is emerging as one of the biggest opportunities in mass retailing as cash-strapped consumers opt to do more of their grooming routines at home.

Sales of hair colors are rising thanks to foams; minxlike nails are a hit at drugstores; at-home facial tools are picking up steam, and now, thanks to three major firms, women can get a salon-style gel manicure at home. Gel manicures have become a big business at salons because nail color stays on at least twice the time as a traditional manicure. But prices in the $50-and-up range have shoppers eager to try this service at home.

Louis Vuitton is moving closer to its goal of transforming its flagship at 1 East 57th Street at the corner of Fifth Avenue here into a larger store. Expanding the unit will be achieved by integrating an adjacent building at 743 Fifth Avenue into the existing 20,000-square-foot flagship.

Benefit Cosmetics plans to bring a piece of San Francisco to SoHo in September.

Located at 454 West Broadway between Prince and Houston Streets, a 2,000-square-foot, two-story boutique is intended to serve as the brand’s flagship and will open Sept. 15, said Aurelian Lis, general manager of North America for Benefit Cosmetics.

DKNY is collaborating with Eric Daman, costume designer of the hit TV series “Gossip Girl,” to design a capsule collection of legwear for fall.

DKNY hosiery has been one of the main legwear selections of choice since the show’s inception in 2007. It’s been worn by multiple cast members, was cause for multiple DKNY hosiery on-air promotions during ‘Gossip Girl’ and is often the topic of conversation on DKNY PR Girl’s weekly Twitter party.