Project RunwayJessica Simpson took her seat as guest judge at Thursday's 'Project Runway' show at New York Fashion Week in a super-short, sparkly silver minidress.

Ten aspiring designers showed their collections to Simpson, Heidi Klum, Michael Kors and Nina Garcia, although several knew they already didn't make the cut and won't be the Season 8 winner.

But because the Lifetime show takes advantage of the Mercedes-Benz Fashion Week backdrop for its finale, extra designers needed to participate to keep secret the winners and losers of episodes that haven't yet aired.

'Project Runway' was one of the big events on the day's roster at Lincoln Center, the new home for the seasonal fashion previews.