Taylor Swift & Harry Styles Pack on the PDA at N.Y.C. Party

Taylor Swift and Harry Styles leaving the Crosby Hotel

Miles Diggs/Splash News Online

updated 12/07/2012 AT 11:30 AM ET

originally published 12/07/2012 AT 9:35 AM ET

Their romance is heating up!

New couple Taylor Swift and One Direction’s Harry Styles stepped out at New York’s Crosby Hotel on Thursday night to celebrate a friend’s birthday – and get in a little PDA of their own.

Joined by Dianna Agron, Emma Stone and about a dozen guests, Swift, 22, dressed demurely in black, and Styles, 18, watched as a cake was served and helped to sing along to “Happy Birthday” at the hotel’s Crosby Bar.

Taylor and Harry [were] being very smoochie,” a source at the party told PEOPLE. “They definitely [looked] like a couple.”


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