Before models strutted their stuff to showcase his latest Spring/Summer 2013 collection, the 26-year-old showed up on runway, reported Daily Mail online.
"Ladies and gentlemen, the greatest milliner in the world: Philip Treacy," Gaga said.
Greeting the crowd that included Kim Cattrall, Dita Von Teese and Kelly Brook, the Mother Monster wore a pink long shroud which covered her head.
Under the sheer clothes, she donned what looked like a flesh-colored suit decorated with flower patterns and a pair of high-platform white boots.