Some "Project Runway" fans were worried when Lifetime first announced that it was taking over the series, but as it turns out the network has upped the celebrity ante on Season 6 of the DIY reality hit.

This week's guest judge is the dashing and very blonde Christina Aguilera.

While you'll have to tune in this Thursday at 10pm ET/PT for the full episode, StyleList has a sneak peek at the singer's guest appearance.

Want more "Project Runway" news? Take a peek behind-the-scenes with judge/Marie Claire fashion director Nina Garcia.