Karthik is an Indian playback singer, born on 7 nov 1980 in Chennai,Tamilnadu,India. He started his professional career as a backing vocalist. Karthik showed an interest in music since his school days and he also trained in Carnatic music vocalist. He regularly participated in IIT Madras Fest Saarang along with his college band and he is a hard core fan of Oscar winning music composer A. R. Rahman, Karthik's dream was to meet and work for Rahman. After that he got a chance to meet Rahman with the help of Playback singer Srinivas, who collaborated often with Rahman was Karthik's close friend's cousin. Srinivas encouraged Karthik to look at singing as a career, which prompted Karthik to resume his singing lessons. One year later, Srinivas recommended Karthik's name to Rahman, who needed fresh voices for backing vocalists for a song from Pukar (2000) starring anil kapoor directed by rajkumar santhoshi after one year he got first break at the re-recording of one 2ka 4(2001) starrer Shah Rukh Khan which was directed by Shashilal K. Nair music by A.R. Rahman soon after rahman gave a chance to sing the song from the film star(2001) starring prashanth, jyothika directed by praveen gandhi. karthik sung number of songs for famous music directors A. R. Rahman, Ilaiyaraaja, Hamsalekha, Vidyasagar, Yuvan Shankar Raja, Harris Jeyaraj and Manisharma etc.. he sang a song "Behene De", from Hindi film Raavan (2010) starring vikram, abhishek bacchan, directed by mani rathnam.. it considered as the biggest song in his career. He worked all popular Indian languages like: Telugu,Tamil,Kanada,Malayalam,Hindi,Bengali and he has sung nearly 2000+ songs.
He worked as a music director for the tamil movie Aravaan(2012) and the film has been dubbed in to telugu as Eka Veera starring Aadhi directed by vasanthabalan and Okkadine(2013) satrring nara rohit and nithya menon directed by srinivas raga and Tamilselvanum Thaniyar Anjalum starring jai directed by premsai dubbed in telugu as a courier boy kalyan.