Is Joe Jonas Dating Sky Ferreira?
Sara Jaye Weiss/StarTraks
10/13/2011 AT 05:55 AM EDT
New couple alert? After performing a concert in Times Square, Joe Jonas celebrated with Sky Ferreira at the Hudson Terrace rooftop bar. Arriving at midnight, the pair danced, enjoyed cocktails and linked up arm-in-arm while talking to his family and friends. "They were in a great mood," says an onlooker. "They definitely acted like a dating couple." At one point, Joe stood on top of a table to get everyone at the party to dance. – Paul Chi