Korean pop sensation Psy is expected to be one of the most popular costumes on the streets this Halloween. But New Yorkers will also get a decent dose of the real “Gangnam Style” sensation. The YouTube star will be in town Wednesday for Scott Sartiano’s Halloween birthday bash at The Darby, and we’re told he plans to take the restaurant’s stage for a performance. The staff will be styled like the girls in the “Gagnam Style” video and Richie Akiva and Ronnie Madra will decorate the Meatpacking District space with over 1,000 black lanterns. Pink, Prince, Lionel Richie, Taylor Swift and Bruno Mars have also previously performed at The Darby.