Thotakura Somaraju and Saluri Koteswara Rao, popularly known as Raj-Koti was an Indian film music composers, singer-song writers, record producers, musicians and multi-instrumentalists duo in Telugu Cinema, In a notable career spanning a decade, the duo has garnered particular acclaim for redefining contemporary Telugu film music. They composed maximum 3000 songs. In those songs, 2,500 songs were sung by singers S. P. Balasubrahmanyam and K. S. Chithra.