Mischa Barton celebrated her 23rd birthday at Caviar Kaspia restaurant in Paris on Sunday night.  The former OC actress got wild with her new Parisian friends, including the likes of designers Gianbattista Valli, Oliver Theyskens, model Irina Lazareanu, Iranian photographer Ali Mahdavi and Burlesque dancer Dita Von Teese.  Does this birthday kiss mean Mischa has a new BFF or there something she’s not telling us?