Supermodel Naomi Campbell and Project Runway Season 4 winner Christian Siriano will guest-star on Bravo’s Make Me a Supermodel this week. Naomi will use her catwalk queen skills in training the contestants on mastering the runway. Budding new designer Christian will use his style expertise to help the model wannabes make wise fashion choices. Check out Naomi and Christian on Make Me a Supermodel this Thursday, March 20 at 10 p.m. on Bravo.