Tributes have poured in for the Nightingale of South India, S. Janaki, who passed away on Saturday at the age of 88. Actors Kamal Haasan and Rajinikanth are among the many paying tribute to the legendary playback singer. Janaki Amma began her illustrious career in 1957, making her playback debut in the Tamil film Vidhiyin Vilayattu. That same year, she also sang for the Telugu film M.L.A