What better way to kick off London Fashion Week than a party hosted by Alexa Chung, Phil Oh and Tommy Ton? Last night, the city's fashionable residents and its week-long visitors celebrated the spring shows with a private party at Mahiki, an old nightlife favorite of Prince Harry's. Hamish Bowles, Dree Hemingway and Mia Moretti were among the guests who enjoyed DJ sets by Mike Nouveau and LCD Soundsystem's Nancy Whang.