K. S. Chithra, affectionately known as the "Nightingale of South India," is a distinguished Indian playback singer and Carnatic musician. Born on July 27, 1963, in Thiruvananthapuram, Kerala, she hails from a musically inclined family and received extensive training in Carnatic music from Dr. K. Omanakutty. Over a career spanning nearly five decades, Chithra has recorded over 25,000 songs in various Indian and foreign languages, showcasing her versatility and emotive expression. Her contributions have been recognized with numerous accolades, including six National Film Awards and the Padma Bhushan in 2021. Chithra's melodious voice and profound musicality continue to resonate with audiences worldwide. ([en.wikipedia.org](https://en.wikipedia.org/wiki/K._S._Chithra?utm_source=openai)) S. P. Balasubrahmanyam, often referred to as SPB, was an iconic Indian playback singer whose career spanned over five decades. Born on June 4, 1946, in Konetammapeta, Andhra Pradesh, he was renowned for his versatility and prolific output, recording over 40,000 songs in 16 languages. His collaborations with composers like Ilaiyaraaja and A. R. Rahman produced timeless classics. SPB's contributions earned him six National Film Awards and the Padma Bhushan in 2011. His rich, emotive voice left an indelible mark on Indian music, making him a beloved figure across generations. ([en.wikipedia.org](https://en.wikipedia.org/wiki/S._P._Balasubrahmanyam?utm_source=openai)) Unfortunately, I couldn't find information on the musician Radhika.