Credit: Maro Hagopian

And the winner of Bravo's The Fashion Show: The Ultimate Collection is…

Jeffrey Williams!

The 26-year-old Seattle native beat out Calvin Tran and Dominique Pearl David on Tuesday's finale, earning a $125,000 prize and a fashion spread in Harper's Bazaar.

"I'm really happy with the winner because he did the best collection," designer and judge Isaac Mizrahi told Thursday.

Mizrahi, who hosted the special "SiriusXM's Martha Stewart Living Radio Presents Isaac & Iman on the Red Carpet" on Thursday, added that "it's not really a personal thing -- it's an objective thing. It was the best collection!"

Celebrity guest judge Mary J. Blige seemed to agree, telling Williams that she would wear "everything that came down the runway."

With the guidance of Mizrahi, 49, and supermodel host Iman, 56, Williams and the 11 other contestants were also aided by the input of celebrity judges Rachel Zoe, Johnny Weir and Simon Doonan.

"Johnny has incredible insight -- so visceral and honest. He took it really seriously," Mizrahi told Us.

"The best celebrity judge was Simon Doonan. I thought that was the best show of all. He said, 'My book is called Eccentric Glamour. I have this theory that there is no glamour unless it's slightly eccentric,'" Mizrahi added. "And I think that is the smartest thing I've ever heard in my life. For some reason a lightbulb went off in their brains, all of them, and from that point on they got really, really great."