Why everyone was wearing black colour at Salman Khan's B'day bash

Salman Khan rang in his 51st birthday with style and with his loved ones; both friends and family. Past midnight he cut the huge dark cake based on the theme of Being Human. Adil, the apple of his eyes was there with him when he was cutting the cake. Everyone present there were wearing black dress. Insiders say it gelled with the theme of the nigh. Even his mom Salma was wearing a black dress. He was surrounded by his friends and family members. His rumoured girl friend Iulia was also seen clicking some pictures while cutting the cake.