One person who was not at Nicole Richie's nuptials this weekend: Paris Hilton. Richie agonized over whether to invite her ex-BFF to the wedding for months, friends tell PopEater, but after Hilton's cocaine arrest in Las Vegas, Richie decided to exclude her from the guest list. "Nicole is in a very different place in her life from when she was hanging out with Paris," says a source, but "Paris seems to be in exactly the same spot she was in five years ago. Still partying in Vegas and getting into trouble with the law." Click for more, including what Hilton did on Saturday instead.