Salman once challanged to sing Sonu Nigam toughest songs equally good

Salman then suggested how he sounded as good as Sonu in his Hangoverversion. The Bajrangi Bhaijaan hero went on to challenge Sonu that he would sing one of Nigam's toughest songs and prove his point. The source said, "That is why you had Salman humming Hrithik Roshan's Agneepath song Abhi Mujhme number on last season."