Bollywood singer KK died of cardiac arrest within hours after his concert in Kolkata
Music lovers woke up to the shocking news of the singer's demise
Singer KK's last instagram posts have gone viral
KK's last photos from the Kolkata concert were posted by the singer himself minutes before his death
Singer KK was known for his soulful renditions
Celebrities and music lovers are deeply saddened and shocked by news of his death
Condolences have been pouring in on social media for KK