Watch Nicole Scherzinger guest judge in 'Project Runway All Stars'

The avant-garde challenge—the challenge where designers go big or go home—is finally here on Project Runway All Stars season 4. It seems that Michelle received inspiration for this week in a Progresso soup commercial. (Seriously, watch that linked video and tell me I’m wrong.) On the runway, judges Alyssa Milano, Isaac Mizrahi, and Georgina Chapman—along with guest judge Nicole Scherzinger—critique the design, in this exclusive clip.

All the promos from this week’s episode have led us to believe that Scherzinger and Milano were talking about one of the designers having “RBS” (resting bitchface syndrome), but it turns out Lifetime has tricked us again: They ladies are actually referring to a model and her incredibly disturbing off-kilter lipstick.

Watch the full Project Runway All Stars episode Thursday at 9 p.m. ET on Lifetime, and come back here for the recap.