Celeb Sightings: Olivia Palermo and Jamie Chung Kick Off Fashion Week!

Olivia Palermo and Jamie Chung
Olivia Palermo and Jamie Chung celebrate the launch of Marchesa Voyage for Shopstyle, now available at ShopStyle.com Sara Jaye Weiss

Olivia Palermo and Jamie Chung celebrating the launch of Marchesa Voyage for Shopstyle, now available at ShopStyle.com, in NYC.

Bill Murray, Kristen Wiig and Melissa McCarthy dancing together — until almost 2:30 a.m.! — to tunes by DJ Michelle Pesce at the St. Vincent premiere party hosted by Hudson Bay at the Toronto International Film Festival.

Kim Kardashian West wearing AQ/AQ while shopping with Kanye West in Melbourne, Australia.

Rihanna, Cara Delevingne, Naomi Campbell, Alek Wek and Karlie Kloss all showing their support to model pal Jourdan Dunn's ‘Cell For Gratitude’ charity event at the Chelsea hot-spot No. 8 in NYC.

Lady Gaga, in a black dress, holding hands with boyfriend Taylor Kinney walking to dinner at Sunda in Chicago.

Debra Messing snapping a selfie with tennis star Andy Roddick before heading to the Time Warner Cable Suite to catch the Women’s Finals at the US Open in Flushing, N.Y.

Heidi Klum and Zac Posen taking a lunch break backstage at Lincoln Center with food from Chalk Point Kitchen – a new organic restaurant by restaurateur Matt Levine – in NYC.

Snoop Dogg crashing the Hindu wedding ceremony of Joseph Scheller and Neesha Ghadiali at the Hard Rock Hotel in Chicago.

Alysia Reiner and Dorothy Wang goofing off together on the red carpet for Fashion Palette Austrailia before checking out designer MISHA COLLECTION during New York Fashion Week at Pier 59 in NYC.

Hunter Hayes performing to a stadium full of cheering fans at the 19th annual Arthur Ashe Kids' Day Presented by Hess to kick off the 2014 US Open in Flushing, N.Y.

Tiki Barber, Brandon Jacobs and Plaxico Burress joining fans for Thuzio Executive Club's "Big Blue" Kickoff Party celebrating the start of the 2014 NFL season at Hudson Common in NYC.

Rosario Dawson taking photos and checking out the FotoYapp during Fashion Week in NYC.

Jason Bateman and Tina Fey — who play siblings in This Is Where I Leave You — posing together at the Tribeca Film Institute Annual Benefit in NYC.

Orange Is the New Black star Vicky Jeudy getting a boost with Little Miracles Organic Energy while catching up with a friend between takes in NYC.

Jennifer Hudson wearing an H.Stern Zephyr Cuff at Fashion Rocks in NYC.

Julianne Moore checking out DavidsTea at the NKPR gifting suite at the Toronto International Film Festival.

–Newly married Jenny McCarthy getting her hair primped by Panasonic celebrity stylist Cesar Ramirez at the Panasonic Beauty Bar at Salon SCK in NYC.

Fat Joe celebrating the release of "Stressin," his new single with Jennifer Lopez, at a Hennessy V.S-hosted private dinner at Peter Lugers Steakhouse in NYC.

Darren Criss and Diego Klattenhoff sitting front row during Todd Snyder's first runway show during Fashion Week at Lincoln Center in NYC.

Gary Clark Jr performing for an intimate crowd including Nur Khan and Jeremy Piven during the 3rd anniversary of the Electric Room in NYC.

Simon Pegg chatting about traveling to South Africa during a panel for his film Hector and the Search for Happiness at a screening in NYC.

Audrina Patridge being pampered with a facial and massage at Murad Inclusive Health Spa in El Segundo, CA.

Jennifer Lopez and her crew rehearsing for her Fashion Rocks performance at the Alvin Ailey American Dance Theater in NYC.

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