[Jon Hamm, Justin Timberlake, Hailee Steinfeld] Rachel Bilson and NYLON host dinner at a new restaurant for Ashlee Simpson and Shenae Grimes; Mia Moretti, Caitlin Moe, and Camilla Belle celebrate the reopening of a Chopard boutique with other diamond-lovers and champagne; Jessica Biel plays dinner host with Joe Zee at Chateau for Justin Timberlake, Hailee Steinfeld, Jon Hamm and more; Samantha Ronson and Nicole Richie party at Milk boutique's new pop-up shop; George Clooney, Cindy Crawford and others step out for Alexander Payne's new movie premiere—Tuesday night had plenty to keep this town busy, get all the details on what went down in this edition of Last Night's Parties.
[Jon Hamm, Justin Timberlake, Hailee Steinfeld via]
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