Those stories and more in our daily news roundup.

• "As soon as I met Alexandra, I fell in love with her look and once I heard her sing, I was blown away by her incredible talent," says Erin Fetherston of singer Alexandra McDermott, who will perform at her Spring 2013 presentation and stars in Fetherston's Spring lookbook. [Fashionologie Inbox]
  

• Gucci is sponsoring a tribute to David Bowie's style at London's Victoria and Albert Museum that will open next March. The exhibit, called David Bowie is, will feature over 300 objects, including costumes, handwritten notes, set designs, and album artwork, among other items. [The Daily Telegraph]
  

• Just in time for New York Fashion Week, WWD has released an iPhone app designed to "deliver the news in whatever form our audience needs," says the paper's editor in chief Edward Nardoza. [WWD]
  

• The theme of Tommy Hilfiger's Spring 2013 collection is American optimism. Fitting, as he'll be showing on the same day and at the same time as another big name, Chado Ralph Rucci. [WWD]
  

• H&M will provide a free shuttle service in New York City on Fashion's Night Out. Double-decker buses will pick up and drop off passengers at four locations: 51st Street at Fifth Avenue; 59th Street at Lexington Avenue; Broadway at Prince Street; and 34th Street at Seventh Avenue. [Fashionologie Inbox]
  

• Hermés announced Tuesday that it sued LVMH in July, accusing the luxury conglomerate of insider training and manipulating stock prices in its acquisition of Hermés stock. [Styleite]

Stefano Pilati isn't the only big name in fashion with a new job. Joanna Coles, editor of Marie Claire, will take over for Cosmopolitan editor Kate White on Sept. 10 — right in the middle of New York Fashion Week.

"Cosmopolitan is an iconic brand that resonates with women worldwide," Coles said in a statement. "To be able to take over the flagship edition is both a huge challenge and an incredible opportunity. I relish the chance to put my stamp on Cosmo and make it the young woman's ultimate playbook for confidence, choices and navigating change."

Coles, who has filed stories everywhere from the BBC to New York Magazine, introduced Marie Claire to the world of reality television. In 2008 she produced Running in Heels, a competition show set in the magazine's offices. She also got the brand's name on Project Runway when she hired Nina Garcia as Marie Claire's fashion director the same year.

White had been editor of Cosmopolitan for 14 years. She left to pursue her own writing and speaking engagements.

Update: Coles's office at Marie Claire will now be occupied by Anne Fulenwider, who served as the magazine's executive editor for two years until she became editor in chief of Brides in late 2011. "I have such a strong attachment to the brand and what it delivers to the savvy, stylish women who read it," Fulenwider said about her homecoming. "I look forward to contributing to its continued success on every front — from print to digital to television."

Photo via Joanna Coles.

Former Yves Saint Laurent creative director Stefano Pilati finally has a new gig. Starting Jan. 1, the designer will head to Ermenegildo Zegna, where he will serve not just as head of design for the brand's menswear line, but also as creative director for Agnona, the house's secondary women's ready-to-wear and accessories line.

"With this appointment, we will be able to combine our tradition in tailoring and our leadership in innovative materials with a new vision for men’s fashion," said Gildo Zegna, CEO of Zegna Group. "We have ambitious plans for Agnona and we strongly believe that under his creative leadership we will be able to develop this little jewel into a global brand."

Pilati had been head designer at YSL since 2004; his Fall 2012 collection, shown in Paris last March, was his last for that label. His first collections for Ermenegildo Zegna and Agnona will be shown in June 2013.