Balasubrahmanyam made his debut in film music as a singer in 1966 with Sri Sri Sri Maryada Ramanna, a film scored by his mentor Kodandapani. He has sung more than 39,000 songs [2]since in more than 5 different Indian languages including Telugu, Tamil,Kannada, Hindi and Malayalam. He holds the Guinness record for having sung the most number of song recordings by any single male singer (the corresponding record for a female singer is held by Lata Mangeshkar).