If youre an artist or a designer, it's nice to have fans who are passsionate about your work, and designer Matthew Williamson has a big fan in Prince. The British designer is celebrating his 10th year in business, and last night's fashion show, his first in London after showing in NYC for 5 years was nothing but amazing as Prince made a surprise appearance. The star jumped out of the front row and began a short set of some of his greatest hits including "Kiss". We've got some photos from the riot of color and pattern that was the Williamson show after the jump.

photos:style.com