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The singer received on-stage first aid and continued his performance without interruption.
Award-winning singer Shashaa had previously sung 'Phir Bhi Tumko Chahunga' from 'Half Girlfriend' and 'Khul Ke Jeene ka' from 'Dil Bechara'.
'83' directed by Kabir Khan, revolves around India's historic 1983 World Cup win, and will see Ranveer Singh playing the role of then India captain, the legendary Kapil Dev.