it's time to play the music
We mean 'pig,' but 'puppet' is just as applicable.
Which raises the question: is anyone going to raise the puppet question in this episode? Piggy was only fictionally Vogue Paris' plus size editor. Presumably her dialogue will be improvised by Eric Jacobson, her current performer, so I suppose it's not really all that different from having a celebrity judge who is an actress or singer, not a fashion professional. Perhaps a bit sillier. Which is perfectly appropriate given Piggy's Muppet affiliations.
Or maybe the entire cast is under contract to not make reference to the fact that she's not a real person, and this episode of Project Runway will be a candidate for Muppet canon. Because that would be delightful.