Taylor Swift and Harry Styles were just caught holding hands after leaving a party at New York's Crosby Hotel! The stars have been quietly dating and spending lots of time together in NYC, hanging out at the Central Park Zoo and grabbing sushi. Last night, photographers caught them leaving a friend's birthday party. Tay and Harry engaged in lots of PDA at the party and held hands in front of the photographers. A source from the party spills, "Taylor and Harry were being very smoochy. They definitely looked like a couple."