Hollywood is taking New York City by storm! Several stars have been spotted supporting their favorite designers from Kirsten Dunst at Rodarte to Kate Bosworth at Theory!

New York City has been taken over by Hollywood’s A-list celebs who have been making their way to the tents — it’s definitely been a star-studded week!

Browse through the gallery above and weigh in below!

More style news:

1. Kristen Stewart Stuns In Dramatic Hot Tomboy Look
2. Christian Siriano Gushes About Michelle Obama’s DNC Style
3. Emma Watson Suffers Nipple-Baring Wardrobe Malfunction

No, this girl just wants to have fun! Ash and BF Justin Bartha show that getting catty doesn’t always have to be a bad thing!

If you think Ashley Olsen looks and acts older than her 23 years, then you’ll be pleasantly surprised to see she does have a silly side – just like us!

The pint-sized entrepreneur showed her animalistic side at a joint birthday party for DJ pals Harley Viera-Newton and Cassie Coane at NYC’s Marquee nightclub Feb. 12. She and boyfriend Justin Bartha, 31, donned some kitty masks in the Svedka photo booth and posed real purr-ty together before joining the Kings of Leon boys for some champagne.

Ashley’s twin sis, Mary-Kate , also hit up the party and chatted in a corner with Sam Ronson for most of the night, while other guests like Jared Leto and Kirstin Dunst indulged a 3-tier lime green birthday cake.

Aren’t you glad to see Ash and her man partying like it’s ‘2033?’