Old Navy has followed up its spring Blossom campaign with a back-to-school one featuring Jennie Garth, Jason Priestley, Luke Perry, and Gabrielle Carteris from Beverly Hills, 90210. Watch the ads below, and tell us how Perry fit that motorcycle in his locker. Hollywood magic! Also, which cast would you like to see reunited for the holiday campaign? Probably too soon for an O.C. Chrismukkah?