Krishnakumar Kunnath popularly known as KK, was an Indian playback singer. He has recorded songs in Hindi, Tamil, Telugu, Kannada, Malayalam, Marathi, Bengali, Assamese and Gujarati languages films. KK began his career by singing for advertisement jingles, and made his film debut with an A.R. Rahman soundtrack. KK was noted for his broad vocal range and was considered one of the most versatile singer in India.