K.B. Sundarambal was born on 11 October 1908 in the town of Kodumudi (also spelled "Kodumadi"), on the banks of Kaveri river, in Erode district in Tamil Nadu. As a child, she made money by singing on trains and receiving tips.

That was Sundarambal's training in music. According to some sources, it was while singing thus on a train for alms that the 19-year-old Sundarambal attracted the attention of F. G. Natesa Iyer, an amateur stage actor, producer and talent-scout, later municipal chairman of tiruchchirapalli district, in chennai. According to other sources,^[5] it was a police official named Krishnaswamy Iyer, an acquaintance of Balambal, who discovered the talent in Sundarambal and introduced the 19-year-old girl to P. S. Velu Nair, one of the reigning dramatists of that era.

In either case, Sundarambal is believed to have made her debut in 1927, on the Tamil stage, as a member of a travelling theatre troupe. This was the turning point in her life. The talented young girl honed her voice while performing small roles on stage and keeping audiences entertained between acts. Soon enough, she was playing leading roles on stage. Her early stage plays like "Valli Thirumanam," "Pavalakodi" and "Harishchandra" proved to be great hits. In particular, "Valli Thirumanam", where she co-starred with S.G. Kittappa, was a phenomenal success.

While working together in the theatre, Sundarambal met S. G. Kittappa. They were married in 1927. The couple, together became popular. S. G. Kittappa died in 1933. Sundarambal left the stage after this happened,to pursue a career as a concert artiste. K.B. Sundarambal died in September 1980.

Sundarambal was in films as well, she accepted few film offers. Her most popular films were Manimekhalai, Auvaiyar, Thiruvilayadal, Karaikal Ammaiyar and Kandan Karunai.

Sundarambal and her husband S.G. Kittappa had been much influenced by the Indian independence movement and they became ardent supporters of the Indian National Congress. They had harnessed their popularity and talents to further that cause. Sundarambal continued to champion the movement, recording several gramophone discs extolling the struggle and sacrifices it entailed. She also made it a point to always wear khadi.^[4] She often actively campaigned in support of Congress party candidates at various elections.^[6] After India gained independence, K.B. Sundarambal entered the Legislative Council of Madras State in 1951 as a Congress nominee, thus becoming the first film artist to enter an Indian legislature.

In 1964, the Tamil Isai Sangam conferred upon her the title of "Tamil Isai Perarignar (Tamil Music Ace)." In 1970, the government of India awarded her the Padmashri for her contributions to the arts. Also, She was awarded twice the National Film Award for Best Female Playback Singer by the Government of India. She also won the Tamil Nadu State Film Award for Best Female Playback for Thunaivan in 1969. She was also the first person in the Indian film industry to command a salary of one lakh rupees. She became the first lady member of Tamil Nadu Legislative Assembly.

• Kodumudi Kokilam K.B. Sundarambal varalaru. Biography in Tamil by P. Chozhanadan. Published by Rishabham Pathippagam, K.K. Nagar, Chennai 600 078.