Check out this Duet song Valarntha Kalai sung by P. B. Sreenivas and P. Susheela from Tamil Romantic Movie Kaathiruntha Kangal starring Gemini Ganesan, Savitri, M. R. Radha, S. V. Ranga Rao, Pandari Bai. Directed by T. Prakash Rao and Music composed by Viswanathan–Ramamoorthy. Lyricist Kannadasan.
