Bella Hadid just celebrated her 24th birthday, and the model threw a low-key birthday party to celebrate.Sharing a plethora of party snaps on Instagram, Bella Hadid revealed that she'd been given a beautiful cake with butterflies on top of it for her birthday. Hadid appeared to be spending her special day on vacation with a group of friends, and she looked stunning in a tiny halter top which showed her midriff.