Friends of newlywed Nicole Richie tell me the reality star-turned-author agonized for months over whether or not to invite once-BFF Paris Hilton to her wedding to Joel Madden on Saturday, but at the last minute decided it would be best for everyone if the hotel heiress didn't attend.

"Nicole is in a very different place in her life from when she was hanging out with Paris. She's the mother of two and now a wife while 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," a friend of Nicole's tells me.