Gigi Hadid Parties with Long Line of Model Friends for 23rd Birthday

Gigi Hadid was the clear standout for her 23rd birthday party this week -- but her sis and smoking hot model friends came in at a very close 2nd, 3rd, 4th, 5th, 6th, 7th ... you get it.

Gigi led the charge Monday night heading into an undisclosed venue in Brooklyn, where she was accompanied by her younger sister, Bella, followed by a LONG line of beauties ... including the likes of Olivia Culpo, Cara Delevingne, Amber Heard, Hailey Baldwin, Lily Aldridge, Joan Smalls, Martha Hunt and Nicola Peltz. Her parents tagged along, too.