Blake Lively is a vision as she rolls up to pal Gigi Hadid's 27th birthday bash in NYC

Emily Ratajkowski oozes sex appeal in a clingy neon orange dress at Gigi Hadid's birthday party

Helena Christensen, 53, and Martha Hunt, 32, attend Gigi Hadid's 27th birthday bash in NYC

Bella Hadid cuts a sexy figure while celebrating sister Gigi's 27th birthday in NYC