Welcome back BPR party people for another scintillating episode of Project Runway All Stars. Mr. Zac Posen joins the fray this week to paw his way around the PRAS models, joined by Debi Mazar. It's another confusing, multi-faceted challenge involving summer and edgy and philanthropy that is certain to befuddle the judges and designers alike. Tbone will not be around for the show tonight, sadly, and is entrusting all of you party people to not burn the blog down. Click on the comment tab to join the party!