RALPH PUCCI SIDEWALK CATWALK PRESS / NEWS Diane von Furstenberg, Betsey Johnson and Tommy Hilfiger descend on Broadway's 'Sidewalk Catwalk' By Gina Salamone Broadway will soon be transformed into a runway. Beginning Monday, mannequins decked by dozens of top designers will be installed in the Fashion District for the free exhibit 'Sidewalk Catwalk.' They'll be covered up till Thursday, when they'll be unveiled to the public and remain on display through Sept. 3. A sneak peek reveals that the mannequins are just as diverse as the designers who dressed them. For instance, while Jason Wu's is draped in a strapless beige dress and  simple black belt you could easily imagine on a runway model, others are far more outrageous.    NEXT Page (1 of 7) Back To Press