While her twin sister is busy partying it up overseas at the Atlantis hotel in Dubai, Ashley Olsen was spotted hitting up the New York City party circuit on Thursday night (November 20).

Wearing a black robe-like ensemble, the twin mogul helped MANGO celebrate the relaunch of their Soho flagship store alongside company President Isak Andic, as well as Penelope Cruz's MANGO designer sister Monica Cruz.

Meanwhile, Ashley recently got former "Full House" co-star Bob Saget's approval when it comes to her "National Treasure" actor beau Justin Bartha, whom she's been seeing for 5 months now. "I approve of anyone that makes my friends happy, and they're (Ashley and Mary-Kate) my friends," Saget, 52, told People magazine. "I am protective of the people I love."

Gossip Girls

Enjoy the pictures of Ashley Olsen at the relaunch of MANGO's NYC flagship store (November 20).

Photo Credit: SplashNewsOnline.com