Blond bombshell Gigi Hadid's 20th birthday definitely featured some highs and lows. She co ordinated with Kendall Jenner as they both went monochromatic for a night out. Gigi let her blonde hair flow in black leggings and a white top. Kendall paired a maxi shirt with a printed jacket for a draped effect. It seems Gigi's birthday celebration may have been slightly rocked. She instagrammed a touching snap about losing her irreplaceable companion, Lucky, her dog who was a 9th birthday gift.