Krishna Kumar (also known as K.K./Kay Kay) is an Indian playback singer. He is a prominent singer in Hindi, Tamil, and Telugu films. His name is often confused with the similar screen name of a Bollywood actor, Kay Kay Menon.
Born in Thrissur, Kerala, Krishna Kumar was brought up in New Delhi. A product of Mount St. Mary\'s School, Delhi Cantt. and a graduate of Delhi University, he waited at tables for six months before he got his break, singing in a jingle for a commercial. He appeared in "Josh of India" song for the support of Indian Cricket Team during Cricket World Cup 1999. Following this, he released an album called Pal the title song of which struck a chord with listeners. Songs titled "Aap ki Dua" and "Yaaron" from the same album were also popular.
His first song for a Bollywood film was Chhod Aaye Hum (Maachis). But it was the song Tadap Tadap, from the movie Hum Dil De Chuke Sanam, that brought him into limelight.
His recently released album Humsafar did not go as well as he expected, but some songs fared well such as Raina Bhari Kaari, Ye Kahaan mil Gaye Hum and Aasmaan ke.
Back in Bollywood, he notched up winners with songs such as "Tu Aashiqui Hai" from "Jhankaar Beats" (for which he received a National Award), "Chand Ki Roshni Se" from "Home Delivery", "Awarapan Banjarapan" from "Jism", "It\'s The Time To Disco" from "Kal Ho Naa Ho" and the smash hit "Dus Bahaane" (with Shaan) from the film "Dus". His recent hit songs include "Tu Hi Meri Shab Hai" from the movie Gangster,"O meri Jaan" from Life in a Metro, "Soniye Soniye" from "Aksar", "Mera Pehla Pehla Pyaar Hai" from "Mera Pehla Pehla Pyaar Hai", "Alvida Alvida" from "Life in a Metro", "Ajab Si" from "Om Shanti Om" and "Kya Mujhe Pyaar Hai" from "Woh Lamhe". His latest smash hit "khuda jaane" is from the film "Bachna Ae Haseeno" released in August 2008.
Although, a new singer, his distinctly clear voice and excellent throw has made him Pritam, Vishal-Shekhar and other music director\'s favorite. Also, according to many, he is the new voice of India in the sense that almost all struggling singers want his voice.
On January 24 2008, KK\'s second album Humsafar was released.
He has also sung in South Indian languages - Tamil and Telugu. His Tamil songs popular in Chennai are My Name is Billa from Movie Billa. Uyirin Uyiray from Kaakha Kaakha, Kadalikkum Asai Undu from Movie Chellame, Appadi Podu from Ghilli.