Sripathi Panditaradhyula Sailaja is an Indian singer, Voice Artist and actress who had sung 10000 songs in Tamil, Telugu, Kannada, Malayalam and Hindi films. She had sung most of the songs for Illayaraja, K. Chakravarthy, Ramesh Naidu, K.V. Mahadevan, Chandrabose, Shankar-Ganesh.

Ilaiyaraaja is an Indian musician, composer, arranger, conductor, orchestrator, multi-instrumentalist, lyricist and singer, popular for his works in Indian cinema, prominently in Tamil films. Reputed to be one of the most prolific composers in a career spanning over forty-seven years, he has composed over 7,000 songs and provided film scores for over 1,000 films, apart from performing in over 20,000 concerts. He is nicknamed "Isaignani" and often referred to as "Maestro", the title conferred by the Royal Philharmonic Orchestra, London.