Much has been made of the fact Paris Hilton has failed to return her 24-carat engagement ring to former fiancé Paris Latsis, but what's the real reason her billionaire ex-boyfriend isn't bothered? The ring wasn't real. "[Paris] bought it for herself," a friend told Page Six. "It's a cubic zirconia! The ring Paris [Latsis] gave her was a much smaller one. She lied to Us Weekly about it and everyone picked it up."