Designer and star of MTV’s “The City,” Whitney Port celebrated her younger sister Paige’s birthday at Vanity with friends and family including brother Ryan and older sister Ashley. The group kicked-off the party at Rare 120 then moved it over to Vanity. Port, wearing a white cut-out dress, was having a great time showing off her dance moves. At one point, she stood on her VIP booth and did The Sprinkler for the crowd. Drinks were flowing for the gang who shut down the hotspot at 3:30 a.m.