Lady Gaga kicked off London Fashion Week by taking a starring turn on the catwalk.

Gaga opened her friend Philip Treacy‘s Michael Jackson-themed comeback show. Raising her arms and looking up, the pop icon announced, “Ladies and gentlemen, the greatest milliner in the world: Philip Treacy.”

Treacy, who has designed fanciful hats for Gaga as well as countless royals and celebrities, has not shown at the fashion week for a decade.

Posting an image while wearing a pair of over-sized Mickey Mouse ears she captioned, “Totally surreal wearing Michael Jacksons clothes last night. Phillips so was so groundbreaking and special. #MICKEYJACKSON”

Mickey Jackson?

Gaga was joined by fellow celebrities Kim Cattrall, Grace Jones, and Nick Cave in the front row at the show, which featured Jackson’s legendary stage costumes paired with Treacy’s headgear.

The outfits, which included the original red “Thriller” jacket — were lent from a collection held by the King of Pop’s costume designers. They are set to be auctioned in California in December.