Project Runway TV Show - Project Runway Television Show - Yahoo! TV

The lingering outfitters dive into the jean pool when they must put an original spin on denim.

The seamsters rumble when they must create clothes inspired by professional wrestling divas.

The last challenge before Fashion Week competition centers on the outfitters own artistic expression. Following the elimination, the final designers journey home to work on their signature line.

In Part 1 of the two-part Season 4 finale, the finalists gear up to showcase their lines at Fashion Week at Bryant Park in New York City.

The winning designer is revealed in the conclusion of the two-part Season 4 finale. Pop singer and fashionista Victoria Beckham adds spice as a guest judge.

Mentor Tim Gunn ushers the group on an early-morning field trip to a Newark, N.J., warehouse, where the budding designers must collect recyclable materials and use them to create an outfit.

The designers participate in a green-themed challenge. Natalie Portman serves as the guest judge.

The designers create clothes using various car parts. Stylist Rachel Zoe and Season 3 contestant Laura Bennett serve as guest judges.

The 15 remaining clothiers create hip pregnancy wear for actress-model Rebecca Romijn.

The designers take a fashion field trip to a California beach and create fun surf wear, complete with an avant-garde companion piece. Actress Rachel Bilson and designer Max Azria are the guest judges.

Thirteen is the lucky number when the designers create party dresses for the 13 remaining models.

An unconventional-materials contest tasks the designers to create clothes from newspapers. Actress Eva Longoria Parker and fashion luminary Tommy Hilfiger are the guest judges.

It s the reel deal in a movie-inspired task when the designers create clothes based on film genres.

The designers get the blues when they slip into teams to create garments with a blue hue.

The designers are tasked with revamping a group of divorcées wedding dresses into hip ensembles.

The clothiers spin out showy, shiny stage looks for pop songstress Christina Aguilera. Famed fashion figure Bob Mackie serves as guest judge.

Famous global locales inspire the remaining designers creations.