The countdown is on to Nicole Richie and Joel Madden's wedding, slated for this Saturday, according to Us Weekly.

According to the magazine, Richie recently visited New York City, where she was fitted in a wedding gown from Marchesa. "Nicole brought her stylist Simone Harouche with her. A lot of thought went into her dress--it was a priority for her," a source tells "Us." Another source tells the magazine Richie is deciding between wearing a Marchesa and vintage Chanel gown to the winter-themed soiree.

The wedding, organized by celeb wedding planner Mindy Weiss, is slated to be at her dad Lionel Richie's Beverly Hills estate, where the couple-of-four-years will tie the knot under a tent.

The wedding's guest list reportedly includes Christina Aguilera, Jessica Alba, Quincy Jones, Khloe Kardashian, Samantha Ronson, Ashlee Simpson-Wentz and Pete Wentz.

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