Sloane Stephens beats Serena Williams, plans trip to Jimmy Choo

Now that she’s beaten Serena Williams in the quarterfinals at the Australian Open, 19-year-old American tennis player Sloane Stephens is planning to switch out her tennis shoes for a pair of Jimmy Choos. She says she will spend a portion of the $526,793 she won for reaching the semifinals on a pair of the coveted shoes -- but she’s banking most of the rest of it. [Wall Street Journal]

Stephens went on to lose to top-seeded and defending champ Victoria Azarenka in the semifinals on Thursday, by the way. [ESPN] )

The Jason Wu ruby halter gown that First Lady Michelle Obama wore to the Commander-in-Chief’s Inaugural Ball on Monday has drawn praise around the world. But lesser known is the outfit she wore at a staff-only ball during the evening. Pictures have surfaced of her in elegant black evening pants and a metallic blouse. Lovely, but as of this writing, designer unknown. [Styleite]

Thom Browne, who designed the fit ‘n’ flare jacquard coat Mrs. Obama wore for her husband’s formal swearing-in, is to be honored in April with the Pratt Visionary Award. [WWD]

Leather goods and accessories label Coach plans to launch a line of women’s clothing and has hired Sandra Hill, formerly of Bonobos and Paul Smith, to design it. [Cut]

A new nail polish from Inglot is purportedly the first polish that is OK for Muslim women to wear during the five-times-a-day ritual handwashing before prayers. The polish reportedly is formulated so that it is permeable and water isn’t blocked from reaching the nail. [Cut]

Dior creative director Raf Simons is on tap to design costumes for Sigourney Weaver and Isabelle Huppert in their forthcoming film “Body Art,” Weaver told reporters at Dior’s haute couture show in Paris this week. [WWD]

Fast fashion retailer H&M; plans to put on a runway show in Paris during -- but not as part of -- Paris Fashion Week in February. [Cut]

ALSO:

Dita Von Teese to get a tux from Alexis Mabille

Sigourney Weaver, Jessica Alba, Danielle Steel at Dior

Inauguration 2013: How to copy Michelle Obama’s style