Just before she kicked off the Philip Treacy show wearing a hot pink burka, Lady Gaga turned to the models backstage and slyly asked, "Any tips?" And then out came the pop diva to sing the praises of this designer's unique vision as hyper-tall women in wearable art bounced through the Gothic hall at the Royal Courts of Justice in London during Fashion Week.

Each of them wore original Michael Jackson stage costumes, which will be auctioned on December 2 in Beverly Hills. Among the wildly inventive headwear was a Swarovski crystal glove, a Neverland ferris wheel, and spiked filament orbs that glittered in the dark. The Irish-born milliner has put his brilliantly quirky trademark on everything from Royal wedding fascinators to award-winning hotels.

Look for more behind-the-scenes details of the designer and his celebrated fans (Isabella Blow, Naomi Campbell, Grace Jones, Princess Anne) in the upcoming documentary "Philip Treacy by Kevin Davies," to be published in February 2013.