Fashion’s Night Out is arguably the biggest event held during New York Fashion Week to kick-off the week-long festivities. It’s when celebs pile into hundreds and hundreds of stores across the country (mainly in New York City) after hours, and pose for pictures, do press, hang out with their celebrity friends and do some late-night shopping.

Held last Thursday night (Sep 8), this year’s Fashion’s Night Out featured appearances from many celebrities, including Solange, Chanel Iman, Nicole Richie, Mary J. Blige, Rachel Roy, Amare Stoudemire, Angela Simmons, Dwyane Wade, Ne-Yo, Mary Kate & Ashley Olsen, and more!

Check out pics from FNO in NYC below:

Solange Knowles attended Sephora 5th Avenue’s Fashions Night Out event in New York City.

Singers Estelle and Corrine Bailey Rae pose with model Selita Ebanks as the trio attends the DVF Celebration of Fashion’s Night Out in New York City.

Mary Kate and Ashley Olsen kicked off NY Fashion Week by attending the JC Penney and People StyleWatch’s “Miss for a Must” event at the JC Penney store in New York City.

Model Chanel Iman hosted a Fashion’s Night Out event at the Sunglass Hut 5th Avenue flagship store in NYC.

Designer Tommy Hilfiger and singer Joss Stone were on hand for the Tommy Hilfiger Fashion’s Night Out celebration at Macy’s Herald Square in New York.

R&B singer/songwriter Ne-Yo posed with fans, signed Francis Ellargo hats and hit the stage for a performance during an FNO event at Saks Fifth Avenue in New York City.

Actress Joy Bryant hit up Burton Snowboards Fashion’s Night Out celebration in NYC.

Fashion partners Rachel Roy and Amar’e Stoudamire from the NY Knicks posed for photos at Macy’s.

Angela Simmons and celebrity stylist June Ambrose met up at the Lanvin boutique.

Fashion designer Rachel Zoe and R&B singer Mary J. Blige had cocktails at Intermix.

Actors Angela Bassett and Samuel L. Jackson posed for pics together as they attended the Giorgio Armani Madison Avenue Fashion’s Night Out event at Giorgio Armani Madison Avenue.

And basketball star Dwyane Wade attended Prada’s Fashion’s Night event at their 5th Avenue store in New York City.

But New York City wasn’t the only city participating in Fashion’s Night Out. Take a look at FNO pics from other cities below:

LL Cool J now endorses Gendarme fragrance, and was spotted promoting the men’s cologne at Bloomingdale’s in Century City, California.

Then he headed on over to support his wife Simone at her FNO booth at Bloomingdales, where she was debuting her Simone I. Smith Fall Jewelry Collection.

Naturi Naughton — who stars in NBC’s new show The Playboy Club — showed up at a Fashion’s Night Out event at a Bloomingdales in Chicago, IL.

And designer Nicole Richie attended a Fashions Night Out celebration at The Beverly Center in Los Angeles.