Delhi-born playback singer Krishnakumar Kunnath, better known as simply KK, was among Bollywood's most moving vocalists. The videos for his songs underline his uncommon emotive abilities, whether it's the romantic travelogue for the tender "Khuda Jaane" from Bachna Ae Haseeno, or the glamorous nightlife setting of the clip for the title song from Jhoom Barabar Jhoom.