Karthick Devaraj (born as Karthikeyan Devaraj is an Indian Musician based in Chennai, Tamil Nadu, India. He has been in the spotlight here since appearing in a television singing reality show as a part of "Mani & Band". His performance served as inspiration for AR Rahman, who has included Karthick on numerous live stage shows and in addition karthick have worked with him to play the piano for the song ''vera level sago'' from the movie Ayalaan. Also, along with AR Rahman, Yuvan Shankar Raja, Harris Jeyaraj, GV Prakash and Vidyasagar, Karthick has performed on many live concert.