Please can someone tell me who is this girl with Josh? It's the Gisele Bündchen?

Don't quote me but I think you are correct and that is Giselle Bundchen. It was a Stevin Meisel shoot I think in and around 1997-1998 - around the time it was rumored that Josh and Giselle were dating. I've added a front on pic to the site so you can see her face better.....