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This weekend, amidst the Halloween parties and storm chaos, the European music festival Sensation made it's U.S. debut in Brooklyn at the Barclays Center. From the looks of it, the two-day rager was the place to be this Halloween weekend, and we've got tons of party-goer Instagrams to prove it. From glow-in-the-dark costumes to an unexpected engagement, check out some shots of the madness at the first ever Sensation Innerspace in NYC.