The makers and director of Gangubai Kathiawadi recently s=shares the first look poster of sng Jab Saiyaan featuring Alia Bhatt ruling the floor with her hot dance moves. The song Jab Saiyaan has been composed by Sanjay Leela Bhansali, whileShreya Ghoshal  have sung it. Kumaar penned the lyrics of this high energy song The song releases next day of her upcoming crime drama 'Gangubai Kathiawadi.'