"Zaha is our hero," said Nadja Swarovski, whose company is this year's pavilion and party sponsor. "It's been a super collaboration." Swarovski has also injected the party with a strong fashion vibe: The committee includes Giles Deacon, Philip Treacy, Phoebe Philo, Christopher Kane, Solange Azagury-Partridge and Stephen Webster. Hadid's magic mushrooms will be on display until the proper pavilion — a timber-clad structure that resembles a spinning top by artist Olafur Eliasson and architect Kjetil Thorsen — is unveiled. A Serpentine spokeswoman said the gallery decided to open the pavilion in August so that it could run longer into autumn, overlap with Frieze Art Fair and host a series of planned talks. It will remain at the Serpentine through November.

CLOTHES-HORSING AROUND: Justin Timberlake may be busy bringing SexyBack, but he's clearly not too busy to plug his clothing label William Rast in London. The singer, who's in town for the U.K. leg of his concert tour, was at Harvey Nichols Monday night to fete the U.K. launch of the label, which is being sold exclusively at the store. He and William Rast co-founder Trace Ayala partied with guests, including Max Irons, Petra Nemcova, Lily Cole, Olivia Inge, Reena Hammer and Amy Sacco during cocktails in the Harvey Nichols penthouse bar.

"Our label is inspired by a lot of things," said Timberlake, who was dressed head-to-toe in William Rast rockabilly-meets-streetwear duds. "That's the beauty of fashion, you can combine everything from urban style to couture." The party wound up at around 11 p.m., but not before pal Fergie and Timberlake — who earlier bemoaned not getting much downtime on tour — indulged in an hour of private shopping in the store.

A SHOW OF HANDS: Hands may be expressive, but gloves have personality. Last week, Parisian fashion wit and curator Olivier Saillard made that point with an unusual gloves-on fashion show after Anne Valerie Hash's couture show. Saillard used variants of white gloves worn by trainee secretaries in the Fifties to portray different kinds of journalists. For example, he dedicated one pair with the fingertips snipped off to the "lofty and absent" type who prefers to sit in traffic filing her nails rather than make it to the shows. "The idea was based on imaginary journalists, but Carmel Snow was definitely an inspiration," Saillard explained. "She was an assassin of words."