Krishnakumar Kunnath was born to Malayali parents C.S. Nair and Kanakavalli, he was brought up in New Delhi. After graduating from Kirori Mal College, Delhi University in commerce. KK had a brief stint of eight months as marketing executive in the hotel industry. He is a prominent singer in Hindi, Telugu, Tamil, Kannada and Malayalam films. KK sang 3,500 jingles before breaking into Bollywood. He is an alumnus of Delhi's Mount St Mary's School. His debut album Pal was released in April 1999. In 1994, he gave his demo tape to Louis Banks, Ranjit Barot and Lesle Lewis to get a break in the music arena. He was called by UTV and he sang a jingle for Santogen Suiting ad. In a span of four years, he has sung more than 3,500 jingles in 11 Indian languages. KK was introduced as a playback singer with A. R. Rahman's hit song "College Styley" and "Hello Dr." from Kadir's Kadhal Desam and then "Strawberry Kannae" from AVM Productions's musical film Minsara Kanavu (1997). He got his Bollywood break with "Tadap Tadap" from Hum Dil De Chuke Sanam (1999). Till now, KK has sung more than 500 songs in Hindi and more than 200 songs in Telugu, Bengali, Tamil, Kannada and Malayalam languages. In 2013, KK sang for an international album, Rise Up - Colors of Peace, which consists of songs written by Turkish poet Fetullah Gulen and sung by artists from 12 countries. KK recorded a song named "Rose of My Heart" for the album. KK married his childhood sweetheart Jyothi Krishna in 1991. His son Nakul Krishna sang a song "Masti" from his latest album Humsafar with him. KK also has a daughter named Taamara who loves playing piano according to KK. KK claims that his family is his source of energy.