1. Jessica Simpson Jessica Simpson made her first fashion week appearance at the opening party for the new Just Cavalli flagship store in New York City. Flashbulbs continued to go wild as more stylish stars like Jennifer Lopez and Ashlee Simpson made their way into the party. 2. Roberto Cavalli and Jennifer Lopez Not looking a bit tired since her fiery performance at Fashion Rocks, Jennifer Lopez glowed on the arm of designer Roberto Cavalli as they arrived for the opening bash of his new Just Cavalli boutique. 3. Ashlee Simpson Ashlee Simpson ditched her black jeans and revealed her great gams in a sexy black Cavalli dress with plunging neckline. The pop star joined her sister at the Just Cavalli store-opening party where the DJ set the perfect mood, spinning '80s hits in the neon-heavy boutique. 4. Nicole Richie and Molly Sims Security ushered in the fashionistas before escorting Nicole Richie to her prime seat at the Max Azria show. The crowd gasped as Nicole, in a flowing black halter dress, sat down next to Molly Sims to take in the chic looks from the Italian designer. "I wanted to do the red lip!" said Sims when asked what inspired her glam makeup. 5. Jamie-Lynn Sigler and LeAnn Rimes Jamie-Lynn Sigler and LeAnn Rimes took their seats in the crisp, white tent for a first look at the J. Mendel spring collection, which included plenty of ethereal gowns. "We're sort of going into fall, but it's a very hot New York dayI'm sort of slowly inching into it," said Sigler of her attempts to get into a cooler state of mind despite the warm temperatures.