Stella McCartney

London Fashion Week kicked off yesterday with a magical presentation from Stella McCartney. Many of Stella's friends came out to see her Winter 2012 London Evening Collection, which began with a vegetarian dinner for the likes of Kate Moss, Jamie Hince, and photographer Mario Testino. Models were seated at the tables with guests, and following the meal, excused themselves to perform a choreographed dance routine in Stella's designs. The fun didn't stop there for one guest. Alexa Chung was called to the stage by a magician who hypnotized her and then levitated her body above swords! Stella herself got in on the games by performing a card trick.

Rihanna wore a sexy dress for the party as well. After posing for photos on the red carpet in a sexy jewel-toned gown, she met up inside with Kayne West. Rihanna turns 24 on Monday, and started her celebrating last week at a private post-Grammy party in LA. Another young star, Shailene Woodley, mingled with Vogue editor Anna Wintour, fashion icon Twiggy, and actress Minnie Driver. Shailene doesn't have an Oscar dress yet, but said at the bash, "I have no idea what to wear, so yes, I’m always looking for red carpet dresses."

London Fashion Week is off to a good start; in addition to checking out the gorgeous runway collections, we're also spotting a bevy of celebrities making their mark on the stylish scene. Hollywood girls and fashion insiders, like Kate Moss, Rihanna, and Alexa Chung, all flocked to Stella McCartney's intimate Fall '12 dinner presentation — complete with a fashion flash mob — looking fresh and modern in their sleek and sexy attire. See who else attended the fashionable fête in the slideshow now, then check back later to see Stella McCartney's Fall '12 collection.

>> This season, Stella McCartney decided to forgo her usual show in Paris for an intimate — and unorthodox — dinner presentation at London Fashion Week. Around 100 guests — including Kate Moss, Stella Tennant, Yasmin Le Bon, and Rihanna — attended the Saturday evening event, which began with a magic show and finished with a formal jazz band. The real excitement, however, came with the presentation of McCartney's Fall 2012 collection. While guests dined unassumingly at their tables, models burst forth from the crowd — flash mob-style — in an energetic display of table-dancing, chair-passing, and rowdy hip-shaking. "It was nice to see something different, something dramatic. The clothes looked great," guest Bianca Jagger exclaimed.

We're taking a closer look at the standout details of the Pre-Fall 2012 collections. In this batch of fresh arm and statement footwear from Stella McCartney, Phillip Lim, and Jason Wu, we've picked the best of the bunch. Stella McCartney zeroes in on that London sophisticate with downtown cool; Jason Wu delivers a crop of ladylike bags and shoes — all with pretty pops of color and dainty detailing; and Phillip Lim crafts his minimalist cool with a brilliant palette (like the update on the Pashli in a cherry hue!). Inside, we're picking favorites and zeroing in on the pieces we love. Click on for a glimpse of the goodies to come.

Stella McCartney and Gwyneth Paltrow took Cameron Diaz and Reese Witherspoon to The Arts Club in London last night. The ladies met up for a European reunion while Reese was in the UK promoting This Means War. Cameron has been across the pond for the last week, having been in Paris to attend a variety of the haute couture shows. Gwyneth even made a quick jaunt to France, where she met up with friends and ate a few good meals.

Cameron and Gwyneth launched The Arts Club together back in October during one of Cameron's recent visits there. Gwyneth and Cameron have grown particularly close over the last year, hanging out in London, LA, and NYC. Gwyneth has also recently hit the town with her son, Moses. She tweeted about taking Moses to see the David Hockney exhibition at the Royal Academy and shared a photo of him checking out the landscapes.

Our latest round of celebrity must haves comes from Freida Pinto, Naomi Watts, Stella McCartney, Katherine Heigl, and British It girl Fearne Cotton. Freida's aubergine J Brands are so versatile, they can work for all seasons, and Fearne's slitted maxi is affordable and perfect for a day-to-night transition. Click through for all the fashionable details and to add your favorite pieces to your closet.